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Proportional Flow Control Valves, Bi-Directional

ZL72-31 Proportional, Bi-Directional Flow Control, (ZL72-31)

<div>
<h3>Product Operation</h3>
The ZL72-31 provides regulated flow in both directions: from port ➁ to port ➂, or from port ➂ to port ➁. Port ➀ should be blocked. Regulated flow is inversely proportional to electric current applied to the solenoid. 
Operation of Manual Override: To Engage: Turn clockwise approximately 1 turn to reach start point. Continue 
another approximately 5 turns to full shift.To Disengage: Turn counterclockwise approximately 6 turns until positive stop 
is found.
</div>
<div>
<h3>Product Features</h3>
• Excellent linearity and hysteresis. 
• Hardened spool and cage for long life. 
• Effi cient wet armature construction. 
• Optional coil voltages and terminations. 
• Cartridges voltage interchangeable.
</div>
<div>
<h3>Product Ratings</h3>
Maximum Operating Pressure: 240 bar (3500 psi) 
Regulated Flow: 0-50 lpm (0-13 gpm) 
Internal Leakage: 0.38 lpm (0.10 gpm) maximum at 1.5 amp 
Electrical: 2 standard voltage ratings 
Temperature: -40 to 120°C with Buna N seals 
Filtration: See page <a title="9.010.1" href="https://www.savery.co.uk/products/view/9-010-1">9.010.1</a> 
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page <a title="9.060.1" href="https://www.savery.co.uk/products/view/9-060-1">9.060.1</a> 
Installation: No restrictions; See page <a title="9.020.1" href="https://www.savery.co.uk/products/view/9-020-1">9.020.1</a>. 
Cavity: VC12-3; See page <a title="9.112.1" href="https://www.savery.co.uk/products/view/9-112-1">9.112.1</a> 
Cavity Tool: CT12-3X-XX; See page <a title="8.600.1" href="https://www.savery.co.uk/products/view/8-600-1">8.600.1</a> 
Seal Kit: SK12-3X-MM; See page <a title="8.650.1" href="https://www.savery.co.uk/products/view/8-650-1">8.650.1</a> 
Threshold Current 150 ± 50 mA 75 ± 25 mA 
Coil Voltage12 VDC24 VDC 
Max. Control Current 1250 ± 100 mA 625 ± 50 mAU.S. Patent6,167,906 
ELECTRO-PROPORTIONAL VALVES—FLOW CONTROLS 
HYDRAFORCE.com® 
• Unitized, molded coil design. 
• Coil waterproofi ng standard. 
• Manual override option. 
Recommended Electronic Controllers:See page <a title="2.001.1" href="https://www.savery.co.uk/products/view/2-001-1">2.001.1</a> or our Electronics catalog.
</div>

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A solenoid-operated, electrically-variable, pressure-compensated, spool-type, normally open when de-energized, proportional, bi-directional flow control valve. An internal compensator spool provides compensated flow across the proportional orifice regardless of flow direction.

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Bespoke Projects

<ul class="ul1">
<li class="li1">Bespoke lubrication systems for testing Aerospace propulsion using high temperature fluids and test article scavenge capability</li>
<li class="li1">Bespoke lubrication solution for testing Automotive EV components.</li>
<li class="li1">Bespoke assembly rigs for Aircraft landing gear with built in test facilities.</li>
<li class="li1">Bespoke pressure testing and flushing rigs for Aircraft assembly plants.</li>
<li class="li1">Purpose design test benches for fluid power components.</li>
<li class="li1">Ground support trolleys for production and field use for Aircraft testing.</li>
<li class="li1">Hydraulic ring mains for aircraft production and servicing.</li>
<li class="li1">Hydraulic Infrastructure for test houses.</li>
</ul>

Bespoke-Projects

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Savery Hydraulics have a highly experienced team for fluid control for hydraulic, electronic control, installation and project management. Using this experience we have supported customers with a wide range of projects which are not traditionally considered hydraulic equipment. Some examples of bespoke projects we have successfully delivered are:-

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Hydraforce

Hydraforce products meet global quality standards including ISO 9001, QS 9000 and CE. Every Hydraforce valve, coil, solenoid, manifold and electro-hydraulic control goes through rigorous testing and inspection to perform beyond industry standards.

Savery offers one of the most comprehensive lines of hydraulic valves, solenoids and coils and is the UK distributor for the Hydraforce range of products for the mobile and industrial equipment markets, including high performance valves for flow rates of 0.4 to 530lpm and pressure up to 420 bar.

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Hydraulic Control Systems  

Tailored Solutions for Precision Control 
Our in-house hardware and software design team is dedicated to delivering cost-effective and reliable solutions for a wide array of control system needs. From embedded microcontroller systems to large-scale machine controls, we excel in designing and developing systems that meet the most demanding specifications. 
&nbsp;
Cloud-Based Monitoring for Seamless Access 
We offer cloud-based system monitoring solutions that provide 24/7 access through smart phone or tablet apps, giving you real-time insights into your operations from anywhere. 
&nbsp;
Industry-Leading Expertise 
With extensive experience across various industries, including aerospace, automotive, wind turbine testing, marine, and industrial sectors, our engineers bring invaluable expertise to every project. 
 
Hardware and Software Capabilities 
Small-Scale Control Systems: We design cost-effective control systems in-house using bespoke electronic control boards giving you optimal performance for your specific needs. 
Microchip Programming: We specialise in programming microchips for specialist applications in fluid power, providing tailored solutions for precise control. 
Large-Scale Machine Control Systems: Our capabilities include designing dedicated Motor Control Centre (MCC) cabinets and implementing System Control and Data Acquisition (SCADA) plant monitoring for seamless operation of complex machinery. 
Software Authoring: We are proficient in various software platforms, including: 
<ul>
<li>Delta Motion Controllers </li>
<li>National Instruments LabView© </li>
<li>National Instruments LabWindows CVI© </li>
<li>PLCs: Allen Bradley, Siemens, Omron, Schneider, Bachmann, Koyo </li>
<li>HMI and SCADA Systems: Siemens, Schneider, Bachmann, Koyo </li>
</ul>
 
Cost-Effective Solutions, Tailored to Your Needs 
Our deep understanding of different control systems enables us to select the most cost-effective platform to suit your systems development, ensuring you get the best value for your investment. 
At Savery, we are committed to delivering innovative, reliable, and tailored solutions that optimise the performance of your hydraulic systems, empowering you to achieve your goals with precision and efficiency.  
Get in touch with us today to discuss your project needs.

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At Savery, we design and manufacture electronic systems that ensure the safe and efficient control and monitoring of hydraulic equipment. Our expertise lies in providing comprehensive control system solutions tailored to your specific requirements, with a focus on bespoke applications. 

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Hydraulic Control Systems

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Hydraulic Power Unit

Our power units vary from compact, fixed pump systems to intricate setups featuring multiple variable displacement pumps and energy-saving variable speed drive technology. These units can be equipped with control manifolds for basic relief unloading functions or complex hydraulic control circuitry, custom-made for your application. 
We offer bespoke electrical control equipment that can manually or automatically control the power source, adhering to all current safety standards. This can be paired with simple condition monitoring for parameters such as flow, pressure, level, temperature, and fluid condition, or with advanced SCADA data recording for remote access via the cloud. This ensures safe and reliable 24/7 operation of equipment. 
Our power units can include fluid reservoirs ranging from 10 litres to over 14,000 litres, with built-in bund containment to meet regulatory requirements. 
With Savery, you’re in safe hands. We work with you from conception through design, project planning, installation, commissioning, and servicing to deliver a cost-effective and efficient hydraulic and control solution. 
We have successfully completed projects in various industries, including: 
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="1" data-aria-level="1">Civil: Flood Barriers, Roll-on/Roll-off dock equipment </li>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="2" data-aria-level="1">Marine: Ship Stabiliser, steering and deck equipment (with in-house 60 Hz testing capability) </li>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="3" data-aria-level="1">Testing Infrastructure: Automotive, Aerospace, research and production component testing </li>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="4" data-aria-level="1">Mechanical Handling: Large Scissor lifts </li>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="5" data-aria-level="1">Defence and Security: Specialist equipment </li>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="6" data-aria-level="1">Wind: Turbine Blade testing </li>
</ul>
Trust Savery Hydraulics for your hydraulic power needs.

Hydraulic-Power-Unit

At Savery Hydraulics, we specialise in the design and manufacture of hydraulic power units tailored to customer specifications. Our offerings range from single fractional power motors to multiple pump sets, with power installations up to 2 Mw. 

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Savery custom manifolds can be designed as part of a new power unit or to enhance your existing equipment & machinery. Custom designed manifolds offer no-leak, screw-in components with fast and easy valve removal and replacement. 

ManifoldAssembly

Our team of experienced engineers can simplify the most complex hydraulic circuits to reduce cost, improve reliability, minimise pipe work connections and the physical size &amp; weight of the solutions.
Custom manifold assemblies are: 
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="1" data-aria-level="1">Designed by our engineers in house using the latest 3D CAD software for integration into your product. </li>
<li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="2" data-aria-level="1">Designed utilising Hydraforce cartridge valves and a vast range of other manufacturer’s components to achieve the required performance. </li>
<li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="3" data-aria-level="1">Machined using modern CNC equipment with specialist tooling to ensure high quality. </li>
<li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="4" data-aria-level="1">Manufactured from aluminium, steel or stainless steel to meet system pressure, flow and application requirements. </li>
<li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="5" data-aria-level="1">Designed in conjunction with your engineers to ensure we meet your unique requirements and installation needs. </li>
<li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="6" data-aria-level="1">Supplied in a variety of sizes from small manifold blocks with cartridges capable of controlling low(a few litres per minute) flow rate up to large complex assemblies for hundreds of litres per minute. </li>
<li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" aria-setsize="-1" data-aria-posinset="7" data-aria-level="1">Supplied fully assembled &amp; tested in our UK facility &amp; meeting the necessary ISO recommended guidelines for hydraulic cleanliness prior to dispatch. </li>
</ul>

Manifold-Assembly

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Savery custom manifolds can be designed as part of a new power unit or to enhance your existing equipment & machinery. Custom designed manifolds offer no-leak, screw-in components with fast and easy valve removal and replacement.

Manifold Assembly

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Contact Us

Savery hydraulic power packs and mini power packs are the culmination of many years of experience in manufacturing AC and DC power packs.

Small HydraulicPower Packs

The PB300 series of power units offer the latest design and features not normally associated with this type of unit. The units have a pressure up to 300 bar, which is achieved by the use of high specification materials. The centre adaptor can be machined to give a vast range of integral control options for single and double acting circuits.
Applications for this type of unit are numerous DC units for battery powered use include our tail lift packs and can be found on tippers, aerial access equipment and material handling trucks. AC units with power ratings from 0.25kW to 5.5kW have an even greater range of applications including the retail and service industry for the handling of goods &#8211; loading and unloading of vehicles and the lift industry for lifts installed in the home, disabled lifts and automotive assembly plants.
Savery has developed hydraulic power packs specifically for applications such as dock levellers, which provide a bridge between the loading bay and the truck being loaded or unloaded.
PB300 units have;
<ul>
<li>DC units 12V &amp; 24V / 0.2 – 3.5kW.</li>
<li>AC units 3 Phase &amp; 1 Phase / 0.25 – 5.5kW.</li>
<li>A vast range of control options for single and double acting circuits.</li>
<li>Advanced pressure die-cast aluminium centre adaptor.</li>
<li>The ability to eliminate porosity.</li>
</ul>
<img loading="lazy" decoding="async" class="alignnone size-full wp-image-5274" src="https://cms.savery.co.uk/wp-content/uploads/2024/03/E11-Logo.jpg" alt="" width="110" height="48" />

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Savery offer a complete and comprehensive range of hydraulic power units, incorporating highly flexible, cost effective modular construction suited to both OEM and small users. The design of units for special applications is an important part of Savery’s marketing activities and our engineers can develop a unit to perfectly match our customer’s requirements.

Savery hydraulic power packs and mini power packs are the culmination of many years of experience in manufacturing AC and DC power packs.


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Small Hydraulic Power Packs

ZL72-36 Proportional, Bi-Directional Flow Control, (ZL72-36)

<div class="product-info group">
<div>
<h3>Product Operation</h3>
The ZL72-36 provides priority regulated flow to port 1 with input at port 3, and bypass at port 2; or regulated flow from port 3 to port 2 with input at port 1 blocked. Regulated flow is proportional to electric current applied to the solenoid. 
Application Notes: The ZL72-36 may be used for single-acting cylinder applications where lowering is provided by gravity force. There are no minimum load restrictions, provided the load is enough to overcome cylinder friction and other frictions in the system. At low load the lowering speed can be slower than at heavier load if pressure drop is less than the compensation value of the valve. 
The hydraulic circuit must include a check valve and a poppet-type solenoid valve (SV10-20 type) connected as shown on the circuit symbol and placed close to the ZL72-36 valve, if possible in the same manifold. See Application Guide. 
Operation of Manual Override: To Engage: Turn clockwise approximately 1 turn to reach start point. Continue another approximately 5 turns to full shift. To Disengage: Turn counterclockwise approximately 6 turns until positive stop is found.
</div>
<div>
<h3>Product Features</h3>
• Excellent linearity and hysteresis. 
• Optional coil voltages and terminations. 
• Hardened spool and cage for long life. 
• Manual override option. 
• Efficient wet armature construction.
</div>
<div>
<h3>Product Ratings</h3>
Maximum Operating Pressure: 240 bar (3500 psi) 
Regulated Flow: 0-45 lpm (0-12 gpm) 
Internal Leakage: 0.38 lpm (0.10 gpm) at zero current 
Electrical: 2 standard voltage ratings 
Temperature: -40 to 120°C with Buna N seals 
Filtration: See page <a title="9.010.1" href="https://www.savery.co.uk/products/view/9-010-1">9.010.1</a> 
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page <a title="9.060.1" href="https://www.savery.co.uk/products/view/9-060-1">9.060.1</a> 
Installation: No restrictions; See page <a title="9.020.1" href="https://www.savery.co.uk/products/view/9-020-1">9.020.1</a>. 
Cavity: VC12-3; See page <a title="9.112.1" href="https://www.savery.co.uk/products/view/9-112-1">9.112.1</a>; 
Cavity Tool: CT12-3X-XX; See page <a title="8.600.1" href="https://www.savery.co.uk/products/view/8-600-1">8.600.1</a> 
Seal Kit: SK12-3X-MM; See page <a title="8.650.1" href="https://www.savery.co.uk/products/view/8-650-1">8.650.1</a> 
Threshold Current 300 ± 100 mA 150 ± 50 mA 
Coil Voltage12 VDC24 VDC 
Max. Control Current 1600 ± 100 mA 800 ± 50 mA
</div>
</div>
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A solenoid-operated, electrically-variable, three-port, pressure-compensated, spool-type, normally closed when de-energized, proportional, bi-directional, priority-type flow control valve.

ZL72-30 Proportional, Bi-Directional Flow Control, (ZL72-30)

<div>
<h3>Product Operation</h3>
The ZL72-30 provides regulated flow in both directions: from port ➁ to port ➂, or from port ➂ to port ➁. Port ➀ should be blocked. Regulated flow is proportional to electric current applied to the solenoid. 
Operation of Manual Override: To Engage: Turn clockwise approximately 1 turn to reach start point. Continue 
another approximately 5 turns to full shift.To Disengage: Turn counterclockwise approximately 6 turns until positive stop 
is found.
</div>
<div>
<h3>Product Features</h3>
• Excellent linearity and hysteresis. 
• Hardened spool and cage for long life. 
• Effi cient wet armature construction. 
• Optional coil voltages and terminations. 
• Cartridges voltage interchangeable.
</div>
<div>
<h3>Product Ratings</h3>
Maximum Operating Pressure: 240 bar (3500 psi) 
Regulated Flow: 0-50 lpm (0-13 gpm) 
Internal Leakage: 0.38 lpm (0.10 gpm) maximum at 0 current 
Electrical: 2 standard voltage ratings 
Temperature: -40 to 120°C with Buna N seals 
Filtration: See page <a title="9.010.1" href="https://www.savery.co.uk/products/view/9-010-1">9.010.1</a> 
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page <a title="9.060.1" href="https://www.savery.co.uk/products/view/9-060-1">9.060.1</a> 
Installation: No restrictions; See page <a title="9.020.1" href="https://www.savery.co.uk/products/view/9-020-1">9.020.1</a>. 
Cavity: VC12-3; See page <a title="9.112.1" href="https://www.savery.co.uk/products/view/9-112-1">9.112.1</a> 
Cavity Tool: CT12-3X-XX; See page <a title="8.600.1" href="https://www.savery.co.uk/products/view/8-600-1">8.600.1</a> 
Seal Kit: SK12-3X-MM; See page <a title="8.650.1" href="https://www.savery.co.uk/products/view/8-650-1">8.650.1</a> 
• Unitized, molded coil design. 
• Coil waterproofi ng standard. 
• Manual override option. 
Threshold Current 250 ± 100 mA 125 ± 50 mA 
Coil Voltage12 VDC24 VDC 
Max. Control Current 1500 ± 200 mA 750 ± 100 mA 
ELECTRO-PROPORTIONAL VALVES—FLOW CONTROLS 
HYDRAFORCE.com® 
Recommended Electronic Controllers:See page <a title="2.001.1" href="https://www.savery.co.uk/products/view/2-001-1">2.001.1</a> or our Electronics catalog.
</div>

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A solenoid-operated, electrically-variable, pressure-compensated, spool-type, nor-mally closed when de-energized, proportional, bi-directional flow control valve. An internal compensator spool provides compensated flow across the proportional orifice regardless of flow direction.

ZL70-36 Proportional, Bi-Directional Flow Control, (ZL70-36)

<div>
<h3>Product Operation</h3>
The ZL70-36 provides priority regulated flow from port 1 to port 3 with bypass at port 2; or regulated flow from port 3 to port 2 with port 1 blocked externally, typically with a check valve (see symbol drawing). Regulated flow is proportional to electric current applied to the solenoid. 
Application Notes: The ZL70-36 may be used for single-acting cylinder applications where lowering is provided by gravity force. The ZL 70-36 has no minimum load restrictions provided the load is enough to overcome cylinder friction and other frictions in the system. At low loads, the lowering speed can be slower than at heavier load if pressure drop is less than the compensation value of the valve. 
The hydraulic circuit must include a check valve and a poppet-type solenoid valve (SV08-20 type) connected as shown on the circuit symbol and placed close to the ZL70-36 valve, if possible in the same manifold. See Application Guide. 
Operation of Manual Override: To Engage: Turn clockwise approximately 1 turn to reach start point. Continue another approximately 5 turns to full shift. To Disengage: Turn counterclockwise approximately 6 turns until positive stop is found.
</div>
<div>
<h3>Product Features</h3>
• Excellent linearity and hysteresis. 
• Efficient wet armature construction. 
• Hardened spool and cage for long life. 
• Manual Override option. 
• Optional coil voltages and terminations.
</div>
<div>
<h3>Product Ratings</h3>
Maximum Operating Pressure: 240 bar (3500 psi) 
Regulated Flow: 0–19 lpm (0–5.0 gpm); 
Input Flow: 0–25.5 lpm (0–6.5 gpm) 
Internal Leakage: 0.38 lpm (0.10 gpm) maximum at zero current 
Electrical: 2 standard voltage ratings 
Temperature: -40 to 120°C with Buna N seals 
Filtration: See page <a title="9.010.1" href="https://www.savery.co.uk/products/view/9-010-1">9.010.1</a> 
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page <a title="9.060.1" href="https://www.savery.co.uk/products/view/9-060-1">9.060.1</a> 
Installation: No restrictions; See page <a title="9.020.1" href="https://www.savery.co.uk/products/view/9-020-1">9.020.1</a>. 
Cavity: VC10-L3; See page <a title="9.110.1" href="https://www.savery.co.uk/products/view/9-110-1">9.110.1</a>; 
Cavity Tool: CT10-3X-XX; See page <a title="8.600.1" href="https://www.savery.co.uk/products/view/8-600-1">8.600.1</a> 
Seal Kit: SK10-3X-MM; See page <a title="8.650.1" href="https://www.savery.co.uk/products/view/8-650-1">8.650.1</a> 
Threshold Current 300 ± 100 mA 150 ± 50 mA 
Coil Voltage12 VDC24 VDC 
Max. Control Current 1400 ± 100 mA 700 ± 50 mA
</div>

2-662-1-symbols

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ZL70-31 Proportional, Bi-Directional Flow Control, (ZL70-31)

<div>
<h3>Product Operation</h3>
The ZL70-31 provides regulated flow from port ➁ to port ➂, or regulated flow from port ➂ to port ➁. Port ➀ should be blocked. Regulated flow is inversely proportional to electric current applied to the solenoid. 
Operation of Manual Override: To Engage: Turn clockwise approximately 1 turn to reach start point. Continue 
another approximately 5 turns to full shift.To Disengage: Turn counterclockwise approximately 6 turns until positive stop 
is found.
</div>
<div>
<h3>Product Features</h3>
• Excellent linearity and hysteresis characteristics. 
• Hardened spool and cage for long life. 
• Optional coil voltages and terminations. 
• Effi cient wet armature construction. 
• Manual Override option.
</div>
<div>
<h3>Product Ratings</h3>
Maximum Operating Pressure: 240 bar (3500 psi) 
Regulated Flow: Range A: 0–19 lpm (0–5.0 gpm); Range B: 0–9.5 lpm (0–2.5 gpm) 
Internal Leakage: 0.38 lpm (0.10 gpm) maximum at zero current 
Electrical: 2 standard voltage ratings 
Temperature: -40 to 120°C with Buna N seals 
Filtration: See page <a title="9.010.1" href="https://www.savery.co.uk/products/view/9-010-1">9.010.1</a> 
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page <a title="9.060.1" href="https://www.savery.co.uk/products/view/9-060-1">9.060.1</a> 
Installation: No restrictions; See page <a title="9.020.1" href="https://www.savery.co.uk/products/view/9-020-1">9.020.1</a>. 
Cavity: VC10-3; See page <a title="9.110.1" href="https://www.savery.co.uk/products/view/9-110-1">9.110.1</a> 
Cavity Tool: CT10-3X-XX; See page <a title="8.600.1" href="https://www.savery.co.uk/products/view/8-600-1">8.600.1</a> 
Seal Kit: SK10-3X-MM; See page <a title="8.650.1" href="https://www.savery.co.uk/products/view/8-650-1">8.650.1</a> 
Threshold Current 50 ± 50 mA 25 ± 25 mA 
Coil Voltage12 VDC24 VDC 
Max. Control Current 1300 ± 100 mA 650 ± 50 mA
</div>

2-622-1-symbols

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A solenoid-operated, electrically-variable, three-port, pressure-compensated, spool-type, normally open when de-energized, proportional, bi-directional, flow control valve. An internal compensator spool provides compensated flow across the proportional orifice regardless of flow direction.

ZL70-30 Proportional, Bi-Directional Flow Control, (ZL70-30)

<div>
<h3>Product Operation</h3>
The ZL70-30 provides regulated flow from port ➁ to port ➂, or regulated flow from port ➂ to port ➁. Port ➀ should be blocked. Regulated flow is proportional to electric current applied to the solenoid. 
Operation of Manual Override: To Engage: Turn clockwise approximately 1 turn to reach start point. Continue 
another approximately 5 turns to full shift.To Disengage: Turn counterclockwise approximately 6 turns until positive stop 
is found.
</div>
<div>
<h3>Product Features</h3>
• Excellent linearity and hysteresis characteristics. 
• Hardened spool and cage for long life. 
• Optional coil voltages and terminations. 
• Effi cient wet armature construction. 
• Manual Override option.
</div>
<div>
<h3>Product Ratings</h3>
Maximum Operating Pressure: 240 bar (3500 psi) 
Regulated Flow: Range A: 0–20 lpm (0–5.3 gpm); Range B: 0–10 lpm (0–2.6 gpm) 
Internal Leakage: 0.38 lpm (0.10 gpm) maximum at zero current 
Electrical: 2 standard voltage ratings 
Temperature: -40 to 120°C with Buna N seals 
Filtration: See page <a title="9.010.1" href="https://www.savery.co.uk/products/view/9-010-1">9.010.1</a> 
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page <a title="9.060.1" href="https://www.savery.co.uk/products/view/9-060-1">9.060.1</a> 
Installation: No restrictions; See page <a title="9.020.1" href="https://www.savery.co.uk/products/view/9-020-1">9.020.1</a>. 
Cavity: VC10-3; See page <a title="9.110.1" href="https://www.savery.co.uk/products/view/9-110-1">9.110.1</a> 
Cavity Tool: CT10-3X-XX; See page <a title="8.600.1" href="https://www.savery.co.uk/products/view/8-600-1">8.600.1</a> 
Seal Kit: SK10-3X-MM; See page <a title="8.650.1" href="https://www.savery.co.uk/products/view/8-650-1">8.650.1</a> 
Threshold Current 250 ± 100 mA 125 ± 50 mA 
Coil Voltage12 VDC24 VDC 
Max. Control Current 1400 ± 100 mA 750 ± 50 mA
</div>

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A solenoid-operated, electrically-variable, pressure-compensated, spool-type, normally closed when de-energized, proportional, bi-directional, flow control valve. An internal compensator spool provides compensated flow across the proportional orifice regardless of flow direction.

ZL72-31 Proportional, Bi-Directional Flow Control, (ZL72-31)

Product Operation

Product Features

Product Ratings

ZL72-36 Proportional, Bi-Directional Flow Control, (ZL72-36)

ZL72-31 Proportional, Bi-Directional Flow Control, (ZL72-31)

ZL72-30 Proportional, Bi-Directional Flow Control, (ZL72-30)

ZL70-36 Proportional, Bi-Directional Flow Control, (ZL70-36)

ZL70-31 Proportional, Bi-Directional Flow Control, (ZL70-31)

ZL70-30 Proportional, Bi-Directional Flow Control, (ZL70-30)

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