TS12-27 Proportional Electric Relief Valve
DESCRIPTION
A screw-in, cartridge-style, pilot-operated, spool-type hydraulic relief 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. This valve is intended
for use as a pressure limiting device in demanding applications.
OPERATION
The TS12-27 blocks fl ow from ➀ to ➁ until suffi cient pressure is present at ➀ to open
the pilot section by overcoming the induced spring force. With no current applied, the
valve will relieve at ±50 psi of the range maximum. Applying current to the coil propor-
tionally decreases the pressure required to open the valve from
➀ to ➁.
Note: This valve is ideal for hydraulic fan drive applications. Consult factory for
electronic controllers specifi cally designed for fan drive applications.
FEATURES
• Hardened parts for long life.
• 12 and 24 volt coils standard.
• Industry common cavity.
• Optional waterproof E-Coils rated up to IP69K.
RATINGS
Maximum Operating Pressure: 241 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:
A: 207–10.34 bar (3000–150 psi)
B: 138–10.34 bar (2000–150 psi)
C: 69–10.34 bar (1000–150 psi)
Rated Flow: 186.3 lpm (50 gpm), ΔP=16.4 bar (238 psi), Cartridge only,
➀ to ➁ coil energized
Maximum Pilot Flow: 0.76 lpm (.2 gpm)
Hysteresis: Less than 3%
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: VC12-2; See page 9.112.1; Cavity Tool: CT12-2XX; See page 8.600.1
Seal Kit: SK12-2X-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
2.864.1
PERFORMANCE
FLOW (gpm)
FLOW (lpm)
PRESSURE (bar)
PRESSURE (psi)
Pressure Drop vs. Flow Characteristic
For Flow ➀ to ➁ with Coil Energized
0 1020304050
0
00
50
100
150
200
250
2
4
6
8
10
12
14
16
18
20
40 80 120 160 200
Cartridge & Body
Body Only
Relief Pressure vs.
Current (DC) Characteristic, 200 Hz PWM
Relieving Pressure ➀ to ➁
PRESSURE (psi)
0
500
1000
1500
2000
2500
3000
3500
PRESSURE (bar)
0
50
100
150
200
250
% of Maximum Control Current
02010 30 50 70 9040 60 80 100
A
B
C
Typical Relief Pressure
vs. Flow Characteristic
Typical Relieving Pressure ➀ to ➁
at Various %’s of Maximum Control Current
Pressure Range “A” (207 bar/3000 psi); Cartridge in Body
FLOW (gpm)
01020304050
% of MAXIMUM RELIEF PRESSURE
50
0
25
75
100
125
% of MAXIMUM RELIEF PRESSURE
50
0
25
75
100
125
FLOW (lpm)
0 40 80 120 160 200
50% Max. Control Current
75% Max. Control Current
100% Max. Control Current
No Control Current
ELECTRO-PROPORTIONAL VALVES—PRESSURE CONTROLS
U.S. Patent
6,267,350
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.
MATERIALS
TO ORDER
TS12-27
2.864.2
TS12-27__ - __ - __ - __ __ __ __
Maximum
Relief Pressure
207 bar (3000 psi) A
140 bar (2000 psi) B
70 bar (1000 psi) C
Porting
Cartridge Only 0
SAE 10 10T
SAE 12 12T
1/2 in. BSP* 4B
3/4 in. BSP* 6B
*BSP Body; U.K. Mfr. Only
Cartridge: Weight: 0.56 kg. (1.23 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and TFE
back-ups standard.
Standard Ported Body: Weight:
0.36 kg. (0.80 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.012.1
Standard Coil: Weight: 0.32 kg.
(0.7 lbs.); Unitized thermoplastic
encapsulated, Class H high
temperature magnet-wire.
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.
DIMENSIONS
U.S. Patent 6,267,350
Seals
Buna N (Std.) N
Fluorocarbon V
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.)
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)
®
HYDRAFORCE
HYDRAFORCE
.com
®
TORQUE
4–5 ft-lbs
(5.4–6.8 Nm)
max.
1.62
41.1
1.84
DIA.
46.7
2.55
64.9
E-Coil
View
Standard
Coil View
Blue rectangles are links to other catalog pages.
