Created on 08/28/2015

 2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2

MODEL

MWEB

Vented, 1.5:1 pilot ratio, load reactive, load control valve

SERIES 2 / CAPACITY: 120 L/min. / CAVITY: T-22A

4-Port Vented

Vented, load reactive load control valves with pilot assist combine two valves; a check valve and a relief valve. The

check valve allows free flow from the directional valve (port 2) to the load (port 1) while a direct-acting, pilot-

assisted relief valve controls flow from port 1 to port 2. Pilot assist at port 3 lowers the effective setting of the relief

valve at a rate determined by the pilot ratio. Backpressure at port 2 does not affect the valve setting because the

spring chamber references the vent (port 4).

TECHNICAL DATA

Pilot Ratio 1.5:1

Maximum Recommended Load Pressure at Maximum Setting 260 bar

Maximum Setting 350 bar

Factory Pressure Settings Established at 30 cc/min.

Maximum Valve Leakage at Reseat 0,3 cc/min.

Check Cracking Pressure 1,7 bar

Adjustment - Number of Counterclockwise Turns to Increase Setting 9

Reseat >85% of setting

Locknut Hex Size 15 mm

Locknut Torque 9 - 10 Nm

Seal kit - Cartridge Buna: 990-022-007

Seal kit - Cartridge Polyurethane: 990-022-002

Seal kit - Cartridge Viton: 990-022-006

(L)CONTROL

L Standard Screw Adjustment

(H)FUNCTIONAL SETTING RANGE

H 1000 - 4000 psi (70 - 280 bar), 3000 psi

(210 bar) Standard Setting

J 2000 - 5000 psi (140 - 350 bar), 3000 psi

(210 bar) Standard Setting

(N)SEAL MATERIAL

N Buna-N

V Viton

snhy.com/MWEB

TECHNICAL FEATURES

Set at least 1.3 times the maximum load induced pressure (1.5 times when the setting is less than 2000 psi or 140 bar).

Turn adjustment clockwise to decrease setting and release load.

Full clockwise setting is 1000 psi (70 bar) for the H range and 2000 psi (140 bar) for the J range.

These valves are capable of modulating over a broader range of flows than the pure poppet designs. The longer stroke allows us to incorporate a uni-directional

damping device that smooths the opening and lets the valve close quickly.

This valve is functionally a 4 port counterbalance valve. It seats as a poppet valve and modulates as a spool valve offering the best of both worlds.

Sun load control and counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in

Model Code Example: MWEBLHNCONFIGURATION OPTIONS

Created on 08/28/2015

 2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2

the circuit.

This valve has positive seals between all ports.

This valve has full relief capacity.

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

MWEBX Vented, fixed setting, 1.5:1 pilot ratio, load reactive, load control valve