PRESSURE CONTROLS
ER12-S30 Pressure Reducing Spool Logic Element
USASI/ISO:
SYMBOLS
PERFORMANCE (Cartridge Only)
6.472.1
DESCRIPTION
A screw-in, cartridge-style, spring biased, pressure reducing logic element.
OPERATION
In its steady state, the ER12-S30 allows fl ow from ➁ to ➀ with the spring chamber
constantly drained at
➂. On attainment of a pre-determined pressure at ➀, set by a
(remote) pilot relief valve connected to port
➂, the spool shifts to restrict input fl ow
at
➁, thereby regulating pressure at ➀.
FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Optional spring ranges to 207 bar (3000 psi).
• Hardened spool and cage for long life.
• Industry common cavity.
RATINGS
Operating Pressure: 350 bar (5000 psi); Polyurethane seals are recommended for
operation up to 5000 psi; Aluminum bodies for this product are rated to 3000 psi
Proof Pressure: 390 bar (5700 psi)
Flow: See Performance Chart
Maximum Pilot Flow: 9.5 lpm (2.5 gpm)
Bias Spring: 8.3 bar (120 psi)
Temperature: -40 to 120°C with standard Buna 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: No restrictions; See page 9.020.1
Cavity: VC12-S3; See page 9.112.1
Cavity Tool: CT12-S3XX; See page 8.600.1
Seal Kit: SK12-3X-BM; See page 8.650.1
20.7/300
6.9/100
17.2/250
13.8/200
10.4/150
3.4/50
FLOW lpm/gpm
PRESSURE bar/psi
Pressure Drop vs. Flow
Flow Path ➁ to ➀ with ➁ connected to ➂
32 cST/150 sus oil at 40°C
19
5
38
10
57
15
76
20
95
25
114
30
34.5/500
31.0/450
10.3/150
6.9/100
3.4/50
27.6/400
24.1/350
17.2/250
20.7/300
13.8/200
FLOW lpm/gpm
PRESSURE bar/psi
Reduced Pressure vs. Flow at Different Pilot Relief Valve Settings
8
2
15
4
23
6
30
8
45
12
38
10
53
14
345/5000
310/4500
103/1500
35/500
69/1000
276/4000
241/3500
172/2500
207/3000
138/2000
FLOW lpm/gpm
PRESSURE bar/psi
19
5
38
10
57
15
76
20
95
25
114
30
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DIMENSIONS
MATERIALS
Cartridge: Weight: 0.29 kg. (0.63 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
1.13 kg. (2.5 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.
TO ORDER
ER12-S30
6.472.2
ER12-S30 - __ __ __ - __
Seals
Buna N (Std.) N
Polyurethane P
Fluorocarbon V
2.44
61.9
TORQUE:
33–37 ft-lbs
(44.7–50.2 Nm)
Note: Polyurethane seals are
recommended for operation
over 241 bar (3500 psi)
Porting
Cartridge Only 0
SAE 8 8T
SAE 10 10T
SAE 12 12T
1/2 in. BSP* 4B
3/4 in. BSP* 6B
*BSP Body; U.K. Mfr. Only
®
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