Created on 04/03/2017
c
2017 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
RPEC8
Pilot operated, balanced piston relief main stage with integral T-8A control
cavity
SERIES 1 / CAPACITY: 95 L/min. / CAVITY: T-10A
NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.
This valve is a normally closed modulating element that incorporates an integral pilot control cavity. It is a balanced
piston design. The pilot control cavity will accept any T-8A pressure control cartridge. When the pressure at the inlet
(port 1) reaches the pilot control cartridge's setting, the modulating element starts to open to tank (port 2), throttling
flow to regulate the pressure. The pilot cartridge's setting determines the difference in pressure between port 1 and
port 2.
TECHNICAL DATA
Cavity T-10A
Series 1
Capacity 95 L/min.
Maximum Operating Pressure 350 bar
Control Pilot Flow 0,11 - 0,16 L/min.
Pilot Control Cavity T-8A
Pilot Control Valve Installation Torque 27 - 33 Nm
Pilot Control Valve Hex Size 22,2 mm
Main stage leakage at 110 SUS (24 cSt) 30 cc/min.@70 bar
Valve Hex Size 22,2 mm
Valve Installation Torque 41 - 47 Nm
Seal kit - Cartridge Buna: 990010007
Seal kit - Cartridge EPDM: 990010014
Seal kit - Cartridge Polyurethane: 990010002
Seal kit - Cartridge Viton: 990010006
Model Weight 0.09 kg.
snhy.com/
RPEC8
Compound cartridge (pilot and main stage) assembly information is provided for reference only. Cartridges must be ordered separately and assembled at
point of use.
NOTES
Created on 04/03/2017
c
2017 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
(W)MINIMUM CONTROL PRESSURE
W 100 psi (7 bar)
D 25 psi (1,7 bar)
(N)SEAL MATERIAL
N Buna-N
E EPDM
V Viton
TECHNICAL FEATURES
All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
Main stage orifice is protected by a 150 micron stainless steel screen.
Not suitable for use in load holding applications due to spool leakage.
Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
NOTE: With the -8 control option, the main stage valve should first be installed to the correct torque value. The T-8A pilot control valve should then be installed into
the main stage valve to its required torque value.
The -8 control option allows the pilot control valve to be incorporated directly into the end of the relief cartridge via the T-8A cavity. These pilot control cartridges are
sold separately and include electro-proportional, solenoid, air pilot, and hydraulic pilot operation. See Pilot Control Cartridges.
Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage
the seals.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge
machining variations.
PERFORMANCE CURVES
RELATED MODELS
RPEC Pilot operated, balanced piston relief valve
Model Code Example: RPEC8WNCONFIGURATION OPTIONS
