PRESSURE CONTROLS
RV10-28 Relief, Pilot-Operated w/Reverse Check
DESCRIPTION
A screw-in, cartridge-style, pilot-operated, two-stage, hydraulic relief valve with
reverse flow check valve. It is intended for use as a pressure limiting device in
demanding hydraulic circuits which require fast response, low hysteresis, low leak-
age, low pressure overshoot and reverse free flow features.
OPERATION
The RV10-28 blocks flow from 1 to 2 until sufficient pressure is present at 1 to force
the pilot stage open, allowing the main stage to shift, opening 1 to 2.
The relief flow path is from 1 to 2. Reverse flow, from 2 to 1, occurs when the
pressure at 2 is at least 2.1 bar (30 psi) higher than at port 1.
FEATURES
• Adjustments cannot be backed out of the valve.
• Hardened spool and cage for long life.
• Fast response.
• Industry common cavity.
RATINGS: Relief Valve Mode
Pressure Rating: 289.6 bar (4200 psi)
Proof Pressure: 620.5 bar (9000 psi)
Burst Pressure: 1241.1 bar (18000 psi)
Flow Rating: Port 1 to 2: 113.6 lpm (30 gpm)
Internal Leakage: 0.53 ml/minute (10 drops/minute) max. to 80% of nominal setting
Crack Pressure Defined: bar (psi) evident at 7.6 lpm (2.0 gpm) attained
Reseat Pressure: Nominal 90% of crack pressure
Approximate Pressure Increment Per Adjuster Turn: 98.6 bar (1430 psi)
Response Time: Relief to Check switch at 241 bar/53 lpm (3500 psi/14 gpm)
condition: 0.6 seconds
RATINGS: Check Valve Mode
Crack Pressure: 2.1 bar (30 psi)
Response Time: Check to Relief switch at 241 bar/53 lpm (3500 psi/14 gpm)
condition: 0.3 seconds
RATINGS: Overall
Operating Temperature: with Buna N seals: -40 to 100°C (-40 to 212°F); with Viton
seals: -26 to 204°C (-15 to 400°F); with Polyurethane seals: -54 to 107°C (-65 to
225°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: No restrictions; See page 9.020.1
Cavity: VC10-2; See page 9.110.1
Cavity Tool: CT10-2XX; See page 8.600.1
Seal Kit: SK10-2X-B; See page 8.650.1
ISO SYMBOL
PERFORMANCE
(Cartridge Only)
6.170.1
276/4000
207/3000
172/2500
241/3500
138/2000
103/1500
70/1000
35/500
38
10
19
5
57
15
95
25
76
20
FLOW lpm/gpm
D PRESSURE bar/psi
114
30
Relief Valve Mode
32 cSt/150 sus oil at 40°C
310/4500
U.S. Patents
7,069,945 &
6,805,155
HYDRAFORCE
.com
®
Note: This new model RV10-28 should be used instead of the older
model RV10-24.
For applications that do not require low-overshoot and reverse
free-flow features, see model RV10-23 (page 6.060.1).
6.9/100
8.6/125
10.3/150
3.4/50
5.2/75
1.7/25
19
5
57
15
38
10
76
20
FLOW lpm/gpm
PRESSURE bar/psi
95
25
114
30
Check Valve Mode (Cartridge Only)
32 cSt/150 sus oil at 40°C
0
Blue rectangles are links to other catalog pages.
Adjustment Option
1/4 in. Hex Allen Head A
1-1/2 in. Dia. Alum. Knob B
Option A w/ Cover Cap C
Factory Preset Non-Adj. F
Factory Preset
Hidden Adj. H
Option C w/
Lockwire Holes L
DIMENSIONS
MATERIALS
Cartridge: Weight: With Adjustment
Options A & B: 0.10 kg. (0.23 lbs.);
Options C & L: 0.11 kg. (0.24 lbs.);
Options F & H: 0.10 kg. (0.22 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Anodized aluminum knobs.
Optional polyurethane seals
with Fluorocarbon back-up
recommended for pressures
over 240 bar (3500 psi).
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 8.010.1
Adjustment Options: For adjustment
options, see page 6.003.1.
TO ORDER
RV10-28__ - __ __ __ - __ - __ __ / __ __ __ __
Porting
Cartridge Only 0
SAE 6 6T
SAE 8 8T
3/8 in. BSP* 3B
1/2 in. BSP* 4B
*BSP Body; U.K. Mfr. Only
RV10-28
6.170.2
Pressure Range
07 13.8 - 51.7 bar
(200 - 750 psi)
35 51.8 - 241.3 bar
(751 - 3500 psi)
42 51.8 - 289.6 bar
(751 - 4200 psi)
Seals
N Buna N (Std.)
V Fluorocarbon
P Polyurethane
INSTALLATION TORQUE:
25–27 ft-lbs (34–36 Nm)
With “H” Style Adjustment Option:
25 ft-lbs (33.9 Nm) max.
Setting in bar
(Blank) for Adjustable, or
Specify, for example:
M230 230 bar
Setting in psi
(Blank) for Adjustable, or
Specify, for example:
35 3500 psi
U.S. Patents 7,069,945 & 6,805,155
®
HYDRAFORCE
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
