Products >> Hydraulic Valve >> SUN Hydraulic Valve

SUN Balanced valve

Product No.：MBEM-XIN
Brand：SUN
Place of Origin：USA
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Product description：
Balanced load control valves combine a balanced modulating element with a reverse flow check. The check valve allows free flow from the directional valve (port 2) to the load (port 1) while the pilot to open modulating element controls flow from port 1 to port 2. Pilot pressure at port 3 determines the flow setting.
This valve has no relief function. Not even thermal expansion relief.
Maximum valve leakage at reseat for I, K, M ranges is 5 drops/min. (0,3 cc/min.) at 200 psi (14 bar) below cracking pressure; E and G ranges is 3 cubic in/min. (50 cc/min.) at 50 psi (3,5 bar) below cracking pressure; H range is 3 cubic in/min. (50 cc/min.) at 75 psi (5 bar) below cracking pressure.
E, G, H ranges are not meant for zero leak type applications.
This valve is balanced against load pressures and therefore exhibits self-compensation. Flow is controlled by the pilot pressure. Because of dynamic seals, performance is best in the meter out mode with port 1 being the load and port 2 being tank.
Backpressure at port 2 directly opposes pilot pressure at port 3.
This valve is a physical replacement for a counterbalance valve but probably won't work well in a cross-piloted cylinder application. A low pilot ratio is needed for machine stability and a balanced load control has an infinitely high pilot ratio.
Applications that use a separate pressure source to the pilot have been successful in providing smooth and stable load control.
All 3-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size).
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 the circuit.
This valve has positive seals between all ports.
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.

Cavity	T-2A
Series	2
Capacity	30 gpm
Maximum Operating Pressure	5000 psi
Maximum Valve Leakage at Reseat	See Technical Features
Check Cracking Pressure	25 psi
Valve Hex Size	1 1/8 in.
Valve Installation Torque	45 - 50 lbf ft
Seal kit - Cartridge Buna	990202007
Seal kit - Cartridge Polyurethane	990002002
Seal kit - Cartridge Viton	990202006

Product features：

Maximum design flexibility with consistent port usage, as well as optimized port connection areas
A minimum number of jacks are used to match 2-,3-,4-, and 6-port cartridge valves, thus reducing the need for jack tools
7 cartridge valve sizes enable flow rates ranging from 0.25 gpm (1 L/min.) to 300 gpm (1100 L/min.)
High operating pressure: All functional valves can withstand 5000 psi (350 bar)
Cartridge valve types are interchangeable without affecting equipment performance

Product description：

MBEM X I N

Control Minimum control force Sealing Material

X： I： 300 psi (20 bar) N：Buna-N

E： 75 psi (5 bar) V：Viton

G：150 psi (10,5 bar)
H: 200 psi (14 bar)
K: 450 psi (33 bar)
M: 525 psi (36,7 bar)