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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: 		xx xx
P
 2 8 9
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
       
0
Nitrile
O-Ring Material
1
Fluoroelastomer
0
  
Nitrile
Diaphragm Material
1
  
Fluoroelastomer

P289 2"
Create Part Number: 		xx xx
P
 2 8 9
16
 XXX 0 0
X
X
 X X
       
16
2"
Port Size
 
001
7-18" W.C. 0.017-0.045 BAR
Spring Range
012
0.5-2.25 PSIG 0.035-0.16 BAR
007
1.75-7 PSIG 0.12-0.16 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:
Consult Factory.
Purchase Details:
Product Contact:
Sales Contact
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
 
Temperature Range
-20–150 ºF with Nitrile and Neoprene
20–300 ºF with Fluoroelastomer
 
Approximate Weight
2 lbs.
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
20–300 ºF with Fluoroelastomer
 
Approximate Weight
15 lbs.
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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