L289 Back Pressure Regulators
The Type L289 Back Pressure 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.
Features:- Throttling Type Relief
- High Flow Rates
- Compact
- Reliability Due to Simplicity
- Tight Shutoff
- Fuel Gas Relief
- Gas Gathering Relief
Filter Connection
NPT
Application(s)
Pressure Protection, Commercial, Industrial
Diaphragm Material
Nitrile or Fluoroelastomer
Seat Material
Brass or Stainless Steel
Body, Bonnet, Diaphragm Material
L289 - Aluminum Body with Aluminum Bonnet
Diaphragm: Nitrile or Fluoroelastomer
Gaskets: Neoprene/Composite
O-rings: Nitrile or Fluoroelastomer
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: Acetal
Diaphragm: Nitrile or Fluoroelastomer
Gaskets: Neoprene/Composite
O-rings: Nitrile or Fluoroelastomer
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: Acetal
Temperature Range(s)
-20–150ºF with Nitrile and Neoprene Elastomers
0–300ºF with Fluoroelastomer
0–300ºF with Fluoroelastomer
Spring Range
W.C. or PSIG / mBAR
5 - 10" W.C. / 12.45 - 24.90
7 - 18" W.C. / 17.43 - 44.83
12 - 40" W.C. / 29.89 - 99.63
0.5 - 2.25 PSIG / 34.47 - 155.03
1.75 - 7 PSIG / 120.65 - 482.63
4 - 10 PSIG / 275.79 - 689.47
5 - 10" W.C. / 12.45 - 24.90
7 - 18" W.C. / 17.43 - 44.83
12 - 40" W.C. / 29.89 - 99.63
0.5 - 2.25 PSIG / 34.47 - 155.03
1.75 - 7 PSIG / 120.65 - 482.63
4 - 10 PSIG / 275.79 - 689.47
Body Sizes
3/4" x 2" NPT
1" x 2" NPT
2" x 2" NPT
1" x 2" NPT
2" x 2" NPT
Max Inlet Body Pressure
25 PSIG 1.7 BAR
Product Description
L289 Back Pressure Regulators
Model
L289
Series
Type 289 Series
Find Your Part Number
Not sure? Call for help. Phone: 304-387-1200
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