Electro-Proportional Valves — Pressure Control

TS98-T34 — Proportional, Pilot-Operated Reducing/Relieving
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TS98-T34 Valve

SYMBOL:
TS98-T34 Valve symbol
DESCRIPTION
A drop-in, flange-mounted, cartridge-style, pilot-operated, spool-type hydraulic
pressure reducing/relieving 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.

OPERATION
Without applied current, the TS98-T34 allows flow from 3 to 4 while blocking 2. When
the coil is energized, 3 is connected to 2, and pressure at 3 is controlled proportional
to the amount of current applied to the coil. If pressure at 3 exceeds the setting induced
by the coil, pressure is relieved to 4. Back pressure on port 4 becomes additive to the
pressure setting at a 1:1 ratio.
Note: Consult factory for special OEM variations of this product.

FEATURES
• 12 and 24 volt coils standard.
• Economical drop-in style.
• Optional lock-down flange
• Several push-on termination options.
• Optional 233 micron mesh screen.
• Integral waterproof coil standard.

RATINGS
Max. Inlet Pressure and Regulated Pressure: 30 bar (435 psi)
Max. Control Current: to achieve 20 bar (290 psi) regulated pressure:
   0.85 amps for 12 VDC coil; 0.43 amps for 24 VDC coil
   Note: Regulated pressures up to 29.3 bar (425 psi) can be attained with increased
   current values and 30 bar (435 psi) inlet pressure
Coil Resistance: 7.25 ohms (12 VDC); 28.5 ohms (24 VDC) at 20ºC (68ºF)
Coil Inductance: 70 mH (12 VDC) 330 mH (24 VDC) at 20ºC (68ºF)
Reducing/Relieving Pressure Range: from zero to max. control current:
   0–20 bar (0–290 psi) with 20.7 bar (300 psi) inlet
Rated Flow: 30 lpm (8 gpm)
Max. Pilot Flow: 0.79 lpm (0.21 gpm) with 20.7 bar (300 psi) inlet
Hysteresis: 5% PWM for 20 bar (290 psi) control pressure
Flow Path: Free Flow: 3 to 4 coil de-energized; Reduced: 2 to 3 coil
   energized; Relieving: 3 to 4 coil energized; Port 1 is not plumbed externally
Internal Leakage at 0A: 0.55 lpm (0.15 gpm) with 20.7 bar (300 psi) inlet
Cycle Life: Five million cycles
Oil Temperature: -40° to 149°C (-40° to 300°F) with HNBR seals;
   -26° to 204°C (-15° to 400°F) with fluorocarbon seals
Ambient Air Temperature: -40° to 80°C (-40° to 176°F)
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: 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; See page 9.020.1
Flange Mounting Screws: M5 x 8; Part No. 4000039 (not provided with valve)
Cavity: VC-T003; See page 9.111.1; Cavity Tool: CT-T003R0-x-G; See page 8.600.1
Seal Kit: SK98-T3N; See page 8.650.1

RECOMMENDED ELECTRONIC CONTROLLERS
The EVDR Series controllers are recommended for use with most HydraForce
proportional valves. These newer electronic controllers are versatile, reliable,
and easily configured and customized for a wide range of applications.
See the EVDR Product Selection Guide.
For other Electronic Controllers, see page 2.001.1_pdf



 

 

PERFORMANCE:

TS98-T34 Valve Performance Chart

 

TS98-T34 Valve Performance Chart

 

TS98-T34 Performance curves

 

DIMENSIONS:

TS98-T34 Valve Dimensions

 

MATERIALS:

Cartridge including Coil:
Weight: 0.24 kg (0.51 lb); Steel with
hardened work surfaces. Zinc-Nickel
plated exposed surfaces; HNBR
O-rings standard. Coil is encapsulated,
class H high-temperature magnetwire,
with zinc-nickel plated shell.

Special Ported Body
Weight: 0.11 kg (0.26 lb) Anodized
high-strength aluminum alloy, rated
to 207 bar (3000 psi). See page 8.010.1_3w
Part No. 71501X0 (sold separately)

Mounting Screws: Must be ordered
separately: Part No. 4000039

 

ORDERING CHART:

TS98-T34 Ordering Chart