TS38-21 Proportional Electric Relief Valve (TS38-21)
A screw-in, cartridge-style, single-stage, poppet-type pressure relieving valve, which can be infi nitely adjusted across a prescribed range using a variable electric input. Pressure output is inversely proportional to DC current input.
Product Operation
The TS38-21 blocks flow from ➀ to ➁ until suffi cient pressure is present at ➀ to open the valve by overcoming the preset spring force. With no current applied, the valve
will relieve at ±50 psi of the spring maximum. Applying current to the coil reduces the
induced spring force thereby reducing the valve setting.
Product Features
• 12 and 24 volt coils standard.
• Optional waterproof E-Coils rated up to IP69K.
• Industry common cavity.
• Hardened parts for long life.
Product Ratings
Maximum Operating Pressure: 240 bar (3500 psi)
Maximum Control Current: 1.10 amps for 12 VDC coil; 0.55 amps for 24 VDC coil
Relief Pressure Range from Zero to Maximum Control Current: Minimum Pressure is factory adjustable.
(A) 207–6.9 bar (3000–100 psi);
(B) 138–6.9 bar (2000–100 psi)
(C) 69–6.9 bar (1000–100 psi);
(D) 241–6.9 bar (3500–100 psi)
Rated Flow: 1.1 lpm/0.3 gpm; ΔP = 10 bar (150 psi), cartridge only, ➀ to ➁ coil energized
Flow Path: Free Flow: ➀ to ➁ coil energized; Relieving: ➀ to ➁ coil de-energized
Temperature: -40 to 120°C (-40 to 250°F) with standard Buna N seals
Filtration: See page 9.010.1
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 9.060.1
Installation Recommendation: When possible, the valve should be mounted below the reservoir oil level. This will maintain oil in the armature preventing trapped air instability. If this is not feasible, mount the valve horizontally for best results.
Cavity: VC08-2; See page 9.108.1;
Cavity Tool: CT08-2XX; See page 8.600.1
Seal Kit: SK08-2X-B; See page 8.650.1
Coil Nut: Part No. 4540550; For E-coils manufactured prior to 1-1-04, see page 3.400.1“>3.400.1“>3.400.1 for coil nut info.
