TS38-21 Proportional Electric Relief Valve
DESCRIPTION
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.
OPERATION
The TS38-21 blocks fl ow 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.
FEATURES
• 12 and 24 volt coils standard.
• Optional waterproof E-Coils rated up to IP69K.
• Industry common cavity.
• Hardened parts for long life.
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 for coil nut info.
USASI/ISO:
SYMBOLS
2.823.1
PERFORMANCE
ELECTRO-PROPORTIONAL VALVES—PRESSURE CONTROLS
U.S. Patent
6,267,350
PRESSURE DROP VS. FLOW CHARACTERISTIC
Flow from Port ➀ to Port ➁ with Coil Energized
Body and Line Pressure Drop: 0.34 bar/5 psi at 1.90 lpm/0.5 gpm
32
28
24
20
16
12
8
4
0
PRESSURE (BAR)
PRESSURE (PSI)
FLOW (GPM)
FLOW (LPM)
0
0
100
200
300
400
500
0.1 0.2 0.3 0.4 0.5
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
Ranges A & B
Range C
TYPICAL RELIEF PRESSURE VS. FLOW CHARACTERISTIC
Typical Relieving Pressure Port ➀ to Port ➁
No Current Applied; Cartridge in Body
FLOW (LPM)
FLOW (GPM)
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
0.1 0.2 0.3 0.4 0.5
0
25
50
75
100
125
150
175
200
225
250
275
PRESSURE (BAR)
0
500
1000
1500
2000
2500
3000
3500
4000
PRESSURE (PSI)
Range C
Range B
Range A
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
DIMENSIONS
MATERIALS
Cartridge: Weight: 0.25 kg. (0.55 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
0.16 kg. (0.35 lbs.); Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.008.1
Standard Coil: Weight: 0.32 kg.
(0.7 lbs.) Unitized, thermoplastic
encapsulated, Class H high
temperature magnetwire.
See page 3.200.1
E-Coil: Weight: 0.41 kg. (0.9 lbs.)
Fully encapsulated with rugged
external metal shell; Rated up to
IP69K with integral connectors.
Note: See page 3.400.1 for all
E-Coil retrofi t applications.
TO ORDER
TS38-21
2.823.2
TS38-21 __ __ - __ - __ __ __ __
Porting
Cartridge Only 0
SAE 6 6T
3/8 in. BSP* 3B
1/2 in. BSP* 4B
*BSP Body; U.K. Mfr. Only
Voltage
0 Less Coil
10 10 VDC (1.30 amps max.)
12 12 VDC (1.10 amps max.)
20 20 VDC (0.65 amps max.)
24 24 VDC (0.55 amps max.)
1.62
41.1
1.84
DIA.
46.7
Standard
Coil View
E-Coil
View
TORQUE
7–10 ft-lbs
(9.5–13.6 Nm) max.
TORQUE
18 – 20 ft-lbs
(24.5 – 27.1 Nm)
2.55
64.9
(continued)
Maximum
Operating Pressure
207 bar (3000 psi) A
138 bar (2000 psi) B
69 bar (1000 psi) C
241 bar (3500 psi) D
Seals
Buna N (Std.) N
Fluorocarbon V
Coils with internal
diode are available.
Consult factory.
Termination Std. Coil
DS Dual Spades
DG DIN 43650
DL Leadwires (2)
DL/W Leads w/Weatherpak
®
Connectors
DR Deutsch DT04-2P
Termination E-Coil
ER Deutsch DT04-2P
(IP69K Rated)
EY Metri-Pack
® 150
(IP69K Rated)
PERFORMANCE
RELIEF PRESSURE VS. CURRENT 200 Hz PWM
Relieving Pressure Port ➀ to Port ➁
with Constant Flow of 0.76 lpm/0.2 gpm
Body and Line Pressure Drop: 0.34 bar/5 psi at 1.90 lpm/0.5 gpm
500
0
1000
1500
2000
2500
3000
3500
% of MAXIMUM CONTROL CURRENT
PRESSURE (BAR)
PRESSURE (PSI)
0 10 20 30 40 50 60 70 80 90 100 110
0
50
100
150
200
Range C
Range B
Range A
U.S. Patent 6,267,350
®
HYDRAFORCE
HYDRAFORCE
.com
®
Recommended Electronic Controllers:
Model EFDR2 Multi-Input Fan Drive Controller.
For more information go to:
http://www.hydraforce.com/Electro/fandrive.htm
or
Recommended Electronic Controllers
catalog page 2.001.1 (Table 2)
Blue rectangles are links to other catalog pages.
