Created on 04/20/2017

 2017 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2

MODEL

RPGC8

Pilot operated, balanced piston relief main stage with integral T-8A control

cavity

SERIES 2 / CAPACITY: 200 L/min. / CAVITY: T-3A

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-3A

Series 2

Capacity 200 L/min.

Maximum Operating Pressure 350 bar

Control Pilot Flow 0,16 - 0,25 L/min.

Pilot Control Cavity T-8A

Main stage leakage at 110 SUS (24 cSt) 50 cc/min.@70 bar

Valve Hex Size 28,6 mm

Valve Installation Torque 61 - 68 Nm

Seal kit - Cartridge Buna: 990203007

Seal kit - Cartridge EPDM: 990203014

Seal kit - Cartridge Polyurethane: 990003002

Seal kit - Cartridge Viton: 990203006

Model Weight 0.17 kg.

(W)MINIMUM CONTROL PRESSURE (N)SEAL MATERIAL

snhy.com/

RPGC8

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

Model Code Example: RPGC8WNCONFIGURATION OPTIONS

Created on 04/20/2017

 2017 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2

W 100 psi (7 bar)

D 25 psi (1,7 bar)

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

RPGC Pilot operated, balanced piston relief valve

RPGC3 Non-adjustable pilot operated, balanced piston relief valve