Page 859 - Softbound_Edition_19_en

Pressure relief valve
Pressure relief valve

Pressure relief valve
NG4-Mini
Flange- or Sandwich construction Wandfluh standard
◆ pilot or direct operated
◆ p = 400 bar
max
◆ p N max = 350 bar
◆ Q = 30 l/min
max

DESCRIPTION APPLICATION
Pilot or direct operated pressure relief valve in flange or sandwich For the limitation of the operating pressure in hydraulic systems by
construction. When the adjusted operating pressure is reached, reliefing the oil from the secured oil line P (1), A (2), B (3) to output /
the main spool opens and connects the protected line with the tank line T (4). Miniature values are used where both, reduced

drain to the tank. For flange or sandwich executions with pressure dimensions and weight are important.

relief in port P, there is a manometer connection.

SYMBOL
Flange execution
B..FA04-P Note! ◆ Direct operated execution drawn
◆ All variants are also available pilot operated

A P T B

Sandwich execution Sandwich execution Sandwich execution Sandwich execution
B..SA04-P B..SA04-A B..SA04-B B..SA04-AB

A P T B A P T B A P T B A P T B

GENERAL SPECIFICATIONS ACTUATION
Designation Pressure relief valve Actuation S = lockable key adjustment
Construction Direct or pilot operated D = lockable knob adjustment
Mounting Flange- or Sandwich construction Note! Other specifications, see data sheet of the screw-in
Nominal size NG4-Mini according to Wandfluh cartridges
standard
Actuation Manually
Ambient temperature -25…+70 °C
Weight 1,35 kg (Flange construction)
1,15 kg (Sandwich construction P, A, B)
1,60 kg (Sandwich construction AB)

www.wandfluh.com Illustrations are not binding Data subject to change 1/3 Edition: 20 44 2.1-620 E
Page 859