BelGAS P289

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P289 Catalog Pages

P289 Backpressure Regulator

Throttling Type Relief
High Flow Rates
Compact
Reliability Due to Simplicity
Tight Shutoff

Product Detail:

The Type P289 Backpressure Regulator functions as a high flow relief valve with an adjustable set point. The P289 can be used in place of a standard relief valve to provide protection against over pressurization in the downstream system. The design of a large diaphragm area and a pitot tube booster allow the valve to respond quickly and relieve the excessive pressure smoothly, especially in low-pressure settings.

Applications include: Fuel Gas Relief; Gas Gathering Relief

Part Numbers:

P289 1" Create Part Number:
P289	08	XXX	0	0	0	X	X	0
	08								1"		Port Size
		004							1-4.5 PSIG	0.069-0.3 BAR	Spring Range
		015							4-15 PSIG	0.3-1.0 BAR
		020							10-20 PSIG	0.69-1.4 BAR
		050							15-50 PSIG	1.0-3.4 BAR
		075							45-75 PSIG	3.5-5.2 BAR
						0			Nitrile		O-Ring Material
						1			Fluoroelastomer
							0		Nitrile		Diaphragm Material
							1		Fluoroelastomer

P289 2" Create Part Number:
P289	16	XXX	0	0	X	X	X	X
	16								2"		Port Size
		001							7-18" W.C.	0.017-0.045 BAR	Spring Range
		002							0.5-2.25 PSIG	0.035-0.16 BAR
		007							1.75-7 PSIG	0.12-0.48 BAR
		010							4-10 PSIG	0.28-0.7 BAR
					0				Brass		Main Seat Material
					1				Stainless Steel
						0			Nitrile		O-Ring Material
						1			Fluoroelastomer
							0		Nitrile		Diaphragm Material
							1		Fluoroelastomer
								0	Brass		Pitot Tube Material
								1	Stainless Steel

Options:

Regulator Rebuild Kits		Part Number
P289 1"	Nitrile diaphragms, Screen & Gasket	971-289-000
P289 1"	Fluorocarbon diaphragm, Screen & Gasket	971-289-001
P289 2"	Nitrile diaphragms, Screen, Screen Gasket (Neoprene), Composite Gaskets (Qty. 3)	971-289-002
P289 2"	Fluorocarbon diaphragm, Screen, Screen Gasket (Neoprene), Composite Gaskets (Qty. 3)	971-289-003

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Specifications:

P289 1" Specifications
	Port Size	1 NPT
	Maximum Relief Inlet Pressure	100 PSIG, 6.9 BAR
	Relief Set Pressure Ranges	1-4.5 PSIG, .07-0.3 BAR 4-15 PSIG, .28-1.0 BAR 10-20 PSIG, 0.7-1.4 BAR 15-50 PSIG, 1-3.5 BAR 45-75 PSIG, 3.1-5.2 BAR
	Temperature Range	-20–150 ºF with Nitrile and Neoprene 0–300 ºF with Fluoroelastomer
	Approximate Weight	2 lbs. (0.907 kg)
P289 1" Materials of Construction
	Body, Bonnet	Aluminum
	Diaphragm	Nitrile or Fluoroelastomer
	Gaskets	Neoprene
	O-Rings	Nitrile or Fluoroelastomer
	O-Ring Piston and Spacer	Aluminum
	Seat Washer	N/A
	Pitot Tube	Aluminum
	Main Seat	N/A
	Spring	Zinc-plated steel
	Diaphragm Piston	Zinc-plated steel
	Closing Cap	N/A
P289 2" Specifications
	Port Size	2 NPT
	Maximum Relief Inlet Pressure	25 PSIG, 1.7 BAR
	Relief Set Pressure Ranges	7-18" W.C, 0.017–0.045 BAR 0.5-2.25 PSIG, 0.035–0.16 BAR 1.75-7 PSIG, 0.12–0.5 BAR 4-10 PSIG, 0.28–0.7 BAR
	Temperature Range	-20–150 ºF with Nitrile and Neoprene Elastomers 0–300 ºF with Fluoroelastomer
	Approximate Weight	15 lbs. (6.803 kg)
P289 2 " Materials of Construction
	Body, Bonnet	Cast iron body with aluminum bonnet
	Diaphragm	Nitrile or Fluoroelastomer
	Gaskets	Neoprene / Composite
	O-Rings	Nitrile or Fluoroelastomer
	O-Ring Piston and Spacer	N/A
	Seat Washer	Stainless Steel
	Pitot Tube	Brass or Stainless Steel
	Main Seat	Brass or Stainless Steel
	Spring	Zinc-plated steel
	Diaphragm Piston	Zinc-plated steel
	Closing Cap	Zinc

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