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LHJA

Modulating element from Sun Hydraulics

Description

Bypass/restrictive modulating elements, when combined with an external orifice, create a bypass/restrictive flow control. Input flow (port 3) is directed to the priority or control flow at port 2. Once the priority requirements are met, excess flow is bypassed out port 4. The after-orifice signal is connected to port 1. The before-orifice design allows both pressure and flow to be controlled on the priority side of the circuit regardless of pressure in the bypass circuit. These valves work equally well in either closed or open center systems. Their main use is to allow after-market accessories to be driven off the host machine’s hydraulic system without adding an additional pump.

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  • Bypass flow is not available until priority flow requirements are satisfied.
  • Priority flow can be turned on or off with a pilot-sized, three-way solenoid valve on port 1.
  • Bypass pressure at port 4 can be higher than pressure at control port 2.
  • Cartridges 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.

Technical Data

Note: Data may vary by configuration. See CONFIGURATION section.

Cavity T-34A
Series 4
Capacity 120 gpm
Capacity (metric) 480 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Valve Hex Size 1 5/8 in.
Valve Hex Size (metric) 41,3 mm
Valve Installation Torque 350 – 375 lbf ft
Valve Installation Torque (metric) 474 – 508 Nm
Model Weight 3.45 lb.
Model Weight (metric) 1.57 kg.
Seal kit – Cartridge Viton: 990034006

Configuration Options

Control

X Not Adjustable

Differential Pressure

E 75 psi (5 bar)
F 100 psi (7 bar)

Seal Material

N Buna-N
V Viton
E EPDM

Material/Coating

/AP Stainless Steel, Passivated
Cavity: T-34A
Nominal Capacity: 120 gpm (480 lpm )
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Possible variants

LHJAXEE, LHJA-XEE, LHJAXEN, LHJA-XEN, LHJAXEN/AP, LHJA-XEN/AP, LHJAXEV, LHJA-XEV, LHJAXEV/AP, LHJA-XEV/AP, LHJAXFE, LHJA-XFE, LHJAXFN, LHJA-XFN, LHJAXFN/AP, LHJA-XFN/AP, LHJAXFV, LHJA-XFV, LHJAXFV/AP, LHJA-XFV/AP