Reducing/Relieving Pressure vs. Flow Characteristic
Regulated Pressure Range: 0–20 bar (0–290 psi) with 20.7 bar (300 psi) Input
Pressure at 2 for Various Control Currents (P Shown for Cartridge & Body)
FLOW (gpm)
978654321 9785643210
PRESSURE (psi)
150
0
50
100
200
250
300
350
PRESSURE (bar)
10
0
5
15
20
25
FLOW (lpm)
253035 20 15 10 505101520253035
Reducing Pressure 2 to 3Relieving Pressure 3 to 4
94% I-Max.
82% I-Max.
70% I-Max.
59% I-Max.
47% I-Max.
35% I-Max.
24% I-Max.
TS98-T34 Proportional Pressure Reducing/Relieving
2.950.1
ELECTRO-PROPORTIONAL VALVES—PRESSURE CONTROLS
DESCRIPTION
A pilot-operated, spool-type, proportional pressure reducing/relieving valve. It is a
drop-in, flange-mounted, cartridge-type valve, which can be infinitely adjusted across
a prescribed range using a variable electric input. Back pressure at port 4 becomes
additive to the pressure setting at a 1:1 ratio. The coil is an integral part of the valve
and is not serviceable. The regulated pressure is proportional to DC current input.
OPERATION
Without applied current, the TS98-T34 allows free flow from 3 to 4. When the coil is
energized, in reducing mode, flow is allowed from port 2 to 3. When the coil is ener-
gized, in relieving mode, flow is allowed from port 3 to 4.
FEATURES
• Economical drop-in style.
• Optional 233 micron mesh screen
• Optional lock-down flange
• 12 or 24 VDC coils.
• Several push-on termination options.
• Integral waterproof coil standard.
RATINGS
Maximum Inlet Pressure and Regulated Pressure: 30 bar (435 psi)
Maximum 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)
Regulated Pressure Range from Zero to Maximum Control Current:
0–20 bar (0–290 psi) with 20.7 bar (300 psi) inlet.
Rated Flow: 30 lpm (8 gpm)
Internal Leakage at 0A: 0.55 lpm (0.15 gpm) with 20.7 bar (300 psi) inlet
Cycle Life: Five million cycles
Operating Fluid Temperature: -40 to 149°C (-40 to 300°F) with HBNR seals.
Storage Temperature: -40 to 70°C (-40 to 160°F)
Ambient Temperature: -40 to 90°C (-40 to 194°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: Flange-mounted. Mounting screws sold separately. Optional lockdown
flange also available.
Flange Mounting Screws: M5 x 8; Part No. 4000039 (sold separately)
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
ISO SYMBOL
PERFORMANCE
FLOW (gpm)
FLOW (lpm)
PRESSURE (bar)
PRESSURE (psi)
Pressure Drop vs. Flow Characteristic
- - - - For Flow 3 to 4 with Coil De-energized
—— For Flow 2 to 3 with Coil Energized
012635478910
0
00
20
140
120
40
60
80
100
2
4
6
8
10
5102015 3025 35
160
Cartridge & Body
Cartridge Only
PRESSURE (psi)
0
50
100
150
200
250
300
PRESSURE (bar)
0
5
10
15
20
% of Maximum Control Current
to achieve 20 bar (290 psi) Regulated Pressure
Note: Regulated pressures up to 29.3 bar (425 psi)
can be attained with increased current values
and 30 bar (435 psi) inlet pressure.
02010 30 50 70 9040 60 80 100
Reduced Pressure vs. Current Characteristic
With Inlet Pressure at 2 of 0–20.7 bar (0–300 psi)
Control Current: 200 Hz Dither
2
1
3
4
HYDRAFORCE
.com
®
TS98-T34
2.950.2
Valve w/Internally Piloted Spool
PERFORMANCE
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 magnet wire,
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
Part No. 71501X0 (sold
separately)
Mounting Screws: Part No.
4000039 (sold separately)
TO ORDER
TS98-T34__ __ - __ - __ - __ __ __ __ - __
Voltage
12 12 VDC
24 24 VDC
Consult factory for other voltages
Porting
Cartridge Only 0
SAE 6 6T
1.16
DIA.
29.5
1.95
49.6
2.59
65.7
INCH
MILLIMETRE
2
1
3
4
LOCK DOWN FLANGE
(Separate Retention
Method Required)
2.20
55.8
ø1.60
40.6
FLANGE MOUNTING
SCREW TORQUE:
2 to 3 ft-lbs (3 to 4 Nm)
1.43
36.3
1.23
31.2
2.93
74.4
0.85
21.5
2.19
55.7
30°
Mounting screws
sold separately
Screen Option
1.75
44.5
3.25
82.6
1.20
30.5
0.62
15.7
2.37
60.1
0.29
7.3
0.41
10.4
4
2
1
3
ALUMINUM
BODY SHOWN
0.28
7.1 TYP
DIMENSIONS
Diode
(Blank) None
Z Zener Diode
Seals
Hydrogenated Nitrile N
(HNBR)
Screen Option
None (Blank)
Inlet Port Screen
233 µm S
(continued)
®
HYDRAFORCE
HYDRAFORCE
.com
®
Termination
DJ Amp Junior Timer
DY2A Metri-Pack® 150.2A
DR Deutsch DT04-2P
Recommended Electronic Controllers:
See page 2.001.1 or our Electronics catalog.
INLET PRESSURE
CURRENT (Ma)
0
750
1500
3.4/50
6.9/100
PRESSURE (bar/psi)
0
10.3/150
13.8/200
17.2/250
20.7/300
TIME (ms)
08040 120200 260 160 240 280
Typical Clutch Step Response Curve
(Performance Will Vary with Specific Clutch)
For an Inlet Pressure at Port 2 of 20.7 bar (300 psi)
Oil Temperature: 38
°
C (100
°
F) 12-Volt Step Input
8040 120200160
CURRENT INPUT RESPONSE
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
Typical Frequency Response Curves; No Flow
Inlet Pressure at Port 2 - 20.7 bar (300 psi)
GAIN (dB)
-180
-90
-45
0
-135
PHASE (degrees)
1 2
FREQUENCY (Hz)
Signal 50% ± 50%
Signal 75% ± 25%
Signal 90% ±10%
Signal 75% ±15%
3 4 5 6 7 89 10 20 30 40 50
Flange Option
Standard (Blank)
Lockdown L
