CONRADER NS Series Pilot Unloader Check Valves, Gasoline Driven
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CONRADER NS Series Pilot Unloader Check Valves, Gasoline Driven


Conrader NS Series pilot unloader check valves are all-in-one combination valves comprising a pilot valve, discharge unloader valve and check valve. They are ideal for gasoline-driven air compressors.

Filter
CONRADER NSG-47A
StyleModelInlet SizeOutlet SizePrice (ex. VAT)
A
NSG-47		-1/2" MNPT€121.13
RFQ
A
NSG-46		-1/2" FNPT€121.13
RFQ
A
NSG-35		#8 JIC Top3/8" MNPT€121.13
RFQ
A
NSG-33		#8 JIC Top1/2" MNPT€121.13
RFQ
A
NSG-51		1/2" 45 deg Flare Top1/2" FNPT€121.13
RFQ
A
NSG-19		1/2" 45 Flare Top1/2" MNPT€121.13
RFQ
A
NSG-54		1/2" BSPT Female1/2" BSPT Female€121.13
RFQ
A
NSG-56		1/2" BSPT Male Top1/2" BSPT Male€121.13
RFQ
A
NSG-4		1/2" Compression Side1/2" FNPT€121.13
RFQ
A
NSG-8		1/2" Compression Side1/2" MNPT€121.13
RFQ
A
NSG-40		1/2" Compression Side3/8" MNPT€121.13
RFQ
A
NSG-53		1/2" Compression Top1/2" BSPT Female€121.13
RFQ
A
NSG-3		1/2" Compression Top1/2" FNPT€121.13
RFQ
A
NSG-7		1/2" Compression Top1/2" MNPT€121.13
RFQ
A
NSG-2		1/2" FNPT Side1/2" FNPT€121.13
RFQ
A
NSG-6		1/2" FNPT Side1/2" MNPT€121.13
RFQ
A
NSG-5		1/2" FNPT Top1/2" MNPT€121.13
RFQ
A
NSG-1		1/2" FNPT Top1/2" FNPT€121.13
RFQ
A
NSG-20		1/2" Inverted Flare Top1/2" MNPT€121.13
RFQ
A
NSG-31		1/2" Inverted Flare Top1/2" FNPT€121.13
RFQ
A
NSG-32		1/2" Inverted Flare Top3/8" FNPT€121.13
RFQ
A
NSG-18		1/2" Top1/2" MNPT€121.13
RFQ
A
NSG-23		1/4" FNPT and 1/2"1/2" MNPT€121.13
RFQ
A
NSG-49		1/4" FNPT Top1/4" FNPT€121.13
RFQ
A
NSG-28		3/4" Compression Top1/2" FNPT€121.13
RFQ
A
NSG-55		3/4" Compression Top3/4" MNPT€121.13
RFQ
A
NSG-27		3/4" Compression Top1/2" MNPT€121.13
RFQ
A
NSG-16		3/8" Compression Side1/2" MNPT€121.13
RFQ
A
NSG-12		3/8" Compression Side1/2" FNPT€121.13
RFQ
A
NSG-15		3/8" Compression Top1/2" MNPT€121.13
RFQ
A
NSG-11		3/8" Compression Top1/2" FNPT€121.13
RFQ
A
NSG-38		3/8" Compression Top3/8" MNPT€121.13
RFQ
A
NSG-10		3/8" FNPT Side1/2" FNPT€121.13
RFQ
A
NSG-14		3/8" FNPT Side1/2" MNPT€121.13
RFQ
A
NSG-9		3/8" FNPT Top1/2" FNPT€121.13
RFQ
A
NSG-37		3/8" FNPT Top3/8" MNPT€121.13
RFQ
A
NSG-13		3/8" FNPT Top1/2" MNPT€121.13
RFQ
A
NSG-26		5/8" Compression Top3/8" MNPT€121.13
RFQ
A
NSG-17		5/8" Compression Top1/2" MNPT€121.13
RFQ
A
NSG-44		5/8" Inverted Flare Side1/2" MNPT€121.13
RFQ
A
NSG-29		5/8" Inverted Flare Top1/2" MNPT€121.13
RFQ
A
NSG-30		5/8" Inverted Flare Top1/2" FNPT€121.13
RFQ

Working Mechanism

  • The valve's pilot remains closed until the downstream pressure reaches the unload setting.
  • The pilot then opens and pressurises the unloader valve.
  • This pressure forces the unloader valve to open and vent the excess air from the compressor to the atmosphere.
  • As the compressed air downstream is used and the pressure drops to the load setting the pilot closes and depressurises the unloader valve.
  • The unloader valve then closes, the pressure begins to build again and the cycle is repeated.

Features

  • These unloader valves protect the compressor pump from the strain of working against pressure during startup, putting less stress on the pump and increasing its operating life.
  • The pilot valve maintains a set pressure range while the engine continues to run in between the cycles of the pump.
  • The check valve prevents backflow as the compressor builds pressure.
  • These valves withstand a maximum temperature and pressure of 400 degrees F and 250 psi, respectively.

Frequently Asked Questions

What is SAE 45 flare?

Brass SAE 45 degrees flare fittings are designed for use on low-pressure copper, brass, aluminium or steel tubing. These fittings are most commonly used in refrigeration, automotive piping systems and vacuum lines.

What is an O-ring?

Viton / Silicon O-rings are used to block fluid inside the valve and prevent fugitive emissions. These rings are squeezed between two metal surfaces and take up the clearance to prevent any fluid or air from being released.

What is the function of a poppet?

Poppet valves are used on gasoline engines and regulate the amount & timing of gas or vapour flow into the engine. The piston-shaped poppet moves the valve seat to open or close during the operation.

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