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BelGAS 289 Series - L289 Relief Valve/Back Pressure Regulator
The L289 Back Pressure Regulator functions as a high flow relief valve with an adjustable set point. The L289 can be used in place of a standard relief valve to provide protection against over pressurization in the downstream system. The design of the 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:
- Low Pressure Applications
- Fuel Gas Relief
- Gas Gathering Relief
Features:
- Aluminum Construction
- Multiple Inlet Sizes
- Throttling Type Relief
- High Flow Rates
- Compact
- Reliability Due to Simplicity
- Tight Shutoff
Specifications
Model
L289
Body Sizes
3/4" x 2" NPT 1" x 2" NPT 2" x 2" NPT
Spring Range
WC or PSIG / mBAR 5 - 10" WC / 12.45 - 24.90 7 - 18" WC / 17.43 - 44.83 12 - 40" WC / 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
Seat Material
Brass or Stainless Steel
Application(s)
Pressure Protection, Commercial, Industrial
Pilot Operated
No
Connection
NPT
Diaphragm Material
Nitrile or Fluoroelastomer
Product Description
L289 Back Pressure Regulators
Temperature Range(s)
-20° to 150°F with Nitrile and Neoprene Elastomers; 0° to 300°F with Fluoro Elastomers
Max Inlet Body Pressure
25 PSIG 1.7 BAR
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
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