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PBFC

Pressure reducing valve from Sun Hydraulics

Description

Air-controlled, pilot-operated pressure reducing cartridges use compressed air over a diaphragm instead of an adjustable spring as the setting to reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1. The air signal is supplied through a port in the hex-end of the cartridge and the hydraulic setting is directly proportional to the air setting at a ratio of 20:1 (hydraulic:air).

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  • All three-port pressure reducing and reducing/relieving cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size). When considering mounting configurations, it is sometimes recommended that a full capacity return line (port 3) be used with reducing/relieving cartridges.
  • Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
  • The pressure at port 3 determines the minimum valve setting and should not exceed 1000 psi (70 bar).
  • The full adjustment range is 50 to 1500 psi (3,5 to 105 bar).
  • Maximum air pressure should not exceed 150 psi (10,5 bar) due to the strength of the diaphragm.
  • Maximum pressure differential, inlet to outlet, should not exceed 3000 psi (210 bar).
  • Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting valves.
  • The air control feature allows explosion proof remote control.
  • 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-2A
Series 2
Capacity 20 gpm
Capacity (metric) 80 L/min.
Maximum Operating Pressure 2000 psi
Maximum Operating Pressure (metric) 140 bar
Pilot Ratio 20:1
Control Pilot Flow 10 – 15 in³/min.
Control Pilot Flow (metric) 0,16 – 0,25 L/min.
Maximum Air Pressure 150 psi
Maximum Air Pressure (metric) 10,5 bar
Valve Hex Size 1 1/8 in.
Valve Hex Size (metric) 28,6 mm
Valve Installation Torque 45 – 50 lbf ft
Valve Installation Torque (metric) 61 – 68 Nm
Adjustment Screw Internal Hex Size 5/32 in.
Adjustment Screw Internal Hex Size (metric) 4 mm
Locknut Hex Size 9/16 in.
Locknut Hex Size (metric) 15 mm
Locknut Torque 80 – 90 lbf in.
Locknut Torque (metric) 9 – 10 Nm
Model Weight 0.61 lb.
Model Weight (metric) 0.27 kg.
Seal kit – Cartridge Viton: 990202006

Configuration Options

Control

A External 1/4 NPTF Port

Operating Range

B 50 – 1500 psi (3,5 – 105 bar)

Seal Material

N Buna-N
V Viton
Cavity: T-2A
Nominal Capacity: 80 lpm (20 gpm)
Downloads
PDFSTP
Possible variants

PBFCABN, PBFC-ABN, PBFCABV, PBFC-ABV

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