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A screw-in, cartridge-style, direct acting, poppet-type hydraulic relief valve, which can be infinitely adjusted across a prescribed range using a variable electric input. Pressure output is proportional to DC current input. This valve is intended for use as a pressure limiting device in demanding applications.
The TS38-20 blocks flow from 1 to 2 until sufficient pressure is present at 1 to offset the electrically induced solenoid force. With no current applied to the solenoid, the valve will free flow from 1 to 2.
Note: Back pressure on port 2 becomes additive to the pressure setting at a 1:1 ratio.
The optional manual override allows the valve to be set when the electric supply is lost. The manual setting is added to the electric setting. To prevent the system from being over pressurized, the manual override should always be disengaged prior to applying power to the coil.
• 12 and 24 volt coils standard.
• Industry common cavity.
Pressure Rating: 248.2 bar (3600 psi)
Proof Pressure: 268.9 bar (3900 psi)
Burst Pressure: 751.5 bar (10900 psi)
Electrical Parameters:
COIL
SERIES
NOMINAL
VOLTAGE
(VDC)
TYPICAL
RESISTANCE AT
20°C (68°F) (OHMS)
VALVE
INDUCTANCE
(Mh)
MAXIMUM CONTROL
CURRENT (A)D127.2 ± 3%1411.102428.8 ± 5%6260.55E127.1 ± 3%1391.322428.5 ± 5%6000.66
Control Signal: DC or PWM (Significant improvements in valve performance occur with superimposed dither, with either control method.)
Dither Frequency: 200 Hz or higher
Hysteresis with Dither 250 Hz: 3.3% (7% maximum without dither)
Operational Relief Pressure Range from Zero to Maximum Control Current:
A: 0–207 bar (0–3000 psi);
B: 0–138 bar (0–2000 psi);
C: 0–69 bar (0–1000 psi)
Note: Minimum pressure setting is dependent on flow through the valve. (See Pressure Drop Curve)
Rated Flow: A: 11.4 lpm/3 gpm @ 20 bar/290 psi pressure drop
B: 11.4 lpm/3 gpm @ 10 bar/150 psi pressure drop
C: 11.4 lpm/3 gpm @ 5.5 bar/80 psi pressure drop
Note: See Pressure Drop Curve.
Internal Leakage: 1 ml/min (20 drops/minute) max. at 207 bar (3000 psi)
Step Response: TON 3.400.1 for coil nut info.
ISO SYMBOL
2.813.1
PERFORMANCEFLOW (gpm)FLOW (lpm)PRESSURE (bar)PRESSURE (psi)Pressure Drop vs. Flow CharacteristicFor Flow 1 to 2 with Coil De-energizedVertical Mount - - - - Horizontal Mount ——1235010015020025030024681012141618202224681210ABCRelief Pressure vs.Current (DC) 250 Hz DitherRelieving Pressure 1 to 2PRESSURE (psi)500100015002000250030003500PRESSURE (bar)50100150200250% of Maximum Control Current201030507090406080100ABC
• Optional waterproof E-Coils rated up to IP69K.
• Manual override optional.ORCE.com®Performance info. continued on following page.
