P289 Back Pressure Regulator • Throttling Type Relief • Compact • Tight Shutoff
• •
A
DIVISION
OF
MARSH
BELLO F R AM
High Flow Rates Reliability Due to Simplicity
The Type P289 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.
Applications • Fuel Gas Relief • Gas Gathering Relief
Specifications Port Size Maximum Relief Inlet Pressure Relief Set Pressure Ranges
Temperature Range
Materials of Construction P289 1"
P289 2"
1 NPT
2 NPT
100 PSIG
6.9 BAR
25 PSIG
1.7 BAR
2 lbs.
0.907 kg
15 lbs.
6.803 kg
P289 1" Part Matrix P289 08
Nitrile or Fluoroelastomer Neoprene Nitrile or Fluoroelastomer Aluminum
N/A
N/A Aluminum N/A Zinc-plated steel Zinc-plated steel
Stainless Steel Brass or Stainless Steel Brass or Stainless Steel Zinc-Plated Steel Zinc-Plated Steel
N/A
Zinc
Aluminum
Diaphragm Gaskets O-rings O-ring Piston and space Seat Washer Pitot Tube Main Seat Spring Diaphragm Piston Closing Cap
P289 2" Part Matrix
0 0 0
0
P289 16 Body Size 1" Spring Range PSIG 1 - 4.5 4 - 15 10 - 20 15 - 50
08
004 015 020 050 075 0 1 0 1
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P289 2" Cast Iron Body with Aluminum Bonnet Nitrile or Fluoroelastomer Neoprene/Composite Nitrile or Fluoroelastomer
Body, Bonnet
1-4.5 PSIG .07-0.3 BAR 7-18” W.C. 0.017–0.045 BAR 4-15 PSIG .28-1.0 BAR 0.5-2.25 PSIG 0.035–0.16 BAR 10-20 PSIG 0.7-1.4 BAR 1.75-7 PSIG 0.12–0.5 BAR 15-50 PSIG 1-3.5 BAR 4-10 PSI 0.28–0.7 BAR 45-75 PSIG 3.1-5.2 BAR -20–150ºF with Nitrile -20–150ºF with Nitrile and Neoprene and Neoprene Elastomers 0–300 ºF 0–300ºF with Fluoroelastomer with Fluoroelastomer
Approximate Weight
P289 1"
0 0
16 BAR 0.07 - 0.3 0.3 - 1.0 0.69 - 1.4 1.0 - 3.4
45 - 75 3.1 - 5.2 O-ring Material Nitrile Fluoroelastomer Diaphragm Material Nitrile Fluoroelastomer
001 002 007 010
Body Size 2" Spring Range W.C. or PSIG 7 - 18" W.C. .05 - 2.25 PSIG 1.75 - 7 PSIG 4 - 10 PSIG Main Seat Material Brass 0 Stainless Steel 1 O-ring Material Nitrile 0 Fluoroelastomer 1 Diaphragm Material Nitrile 0 Fluoroelastomer 1 Pitot Tube Material 0 Brass 1 Stainless Steel
BAR 0.02 - .05 0.04 - 0.16 0.12 - 0.48 0.28 - 0.7
< 43 >
P289 1" Parts Item
Description
1 2 3
Part Number
Adjusting Screw, Plated Steel Hex Nut, Plated Steel Spring Guide, plated steel 1–4.5 PSIG (0.1–0.3 BAR), Pink 4–15 PSIG (0.3–1 BAR), Red Spring 10–20 PSIG (0.7–1.4 BAR), Silver 15–50 PSIG (1–3.4 BAR), & 45–75 PSIG (3.1–5.2 BAR), Green Piston Retainer, Plated Steel Plated Steel (All Output Pressures other than 45-75 PSIG) Piston, Range 45-75 PSIG P289 1” Nitrile Diaphragm P289 1” Fluoroelastomer Stem Guide Assembly Pipe Plug, Plated Steel Spacer Tube, Stainless Steel Nitrile (2 Required) O-ring Fluoroelastomer(2 Required) Pitot Tube, Aluminum Retaining Ring, plated steel Screen, Stainless Steel Gasket, Neoprene Body, Aluminum Nitrile O-ring Fluoroelastomer O-ring Spacer, Aluminum O-ring Piston, Aluminum Machine Screw, Stainless Steel (2 Required) Gasket, Composite (2 Required) Machine Screw (8 Required) Washer, Steel Hex Nut, Plated Steel Bonnet, Aluminum
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
648-487-000 634-154-000 626-079-000 655-688-000 655-689-000 655-676-000 655-690-000 643-191-000 637-306-000 637-319-000 600-497-000 600-497-001 814-014-000 639-099-000 654-178-000 649-000-003 649-000-343 660-051-000 644-051-000 647-018-000 624-063-000 664-295-000 649-293-000 649-293-001 654-177-000 637-311-000 648-488-000 624-062-000 648-466-004 662-204-000 634-162-000 604-221-000
P289 1" Dimensions 7.62 0.30
P289 1" Regulator Rebuild Kits Kit Includes
104.9 4.13
Part Number
P289 1"
Nitrile Diaphragms, Screen & Gasket
971-289-000
P289 1"
Fluorocarbon Diaphragm, Screen & Gasket
971-289-001
205.5 8.09
45.5 1.79 mm inches
< 44 >
52.6 2.07
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P289 2" Parts
A
Item
Description
Part Number
1 2 3
Gasket, neoprene Screen, stainless steel Seat Gasket, neoprene Brass Main Seat Stainless Steel Nitrile O-ring Fluoroelastomer O-ring, Washer, Stainless Steel Stem Guide Assembly, Cast Iron & Brass Upper Pipe Plug Diaphragm Head, Plated Steel Lower Spring Retainer, Zinc Plated Steel 7 to 18" W.C. , Dark Blue 0.5 to 2.25 PSIG (.03 to .15 BAR), Grey Spring 1.75 to 7 PSIG (.12 to .48 BAR), Dark Green 4 to 10 PSIG (.27 to .69 BAR), Red Stripe Bonnet, Aluminum Closing Cap Gasket, Neoprene Closing Cap, Acetal Adjusting Screw, Zinc Upper Spring Seat Washer, Aluminum Hex Nut, Plated Steel Brass Pitot Tube Stainless Steel Machine Bolt, (8 Required) Nitrile Diaphragm Fluoroelastomer Machine Screw, Stainless Steel, (4 Required) Low Pipe Plug, Plated Steel Snap Washer, Plated Steel Brass Spacer Stainless Steel Gasket, Neoprene, (3 Required) Body, Cast Iron Retaining Ring, Plated Steel
624-066-000 647-020-000 624-071-000 650-132-000 650-133-000 649-302-000 649-301-000 662-207-000 814-015-000 639-102-000 637-315-000 643-197-000 655-691-000 655-692-000 655-693-000 655-694-000 604-558-000 624-069-000 610-056-000 648-499-000 662-206-000 634-173-000 660-053-000 660-054-000 648-466-000 618-071-000 618-071-001 648-500-000 639-099-000 662-208-000 654-181-000 654-182-000 624-065-000 664-302-000 644-054-000
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
P289 2" Dimensions
DIVISION
OF
MARSH
BELLO F R AM
P289 2" Regulator Rebuild Kits Kit Includes 182.12
Part Number
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
7.17
mm inches
209.04 8.23
54.1 2.13
89.2 3.51
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< 45 >
P289 Flow Rates Inlet Pressure PSIG BAR 70 4.8
60
4.1
50
3.4
40
2.8
30
2.3
20
1.4
10
0.7
0
0
P289 1" NPT Vent Screen Installed
0
5
10
50 PSIG
15
16
1.10
14
0.97
12
0.85
10
0.69
8
0.55
6
0.41
4
0.28
2
0.14
0
0
< 46 >
30 PSIG
70
75
80
4 PSIG
1 PSIG
16 20 24 28 32 36 40 44 48 52 56 Flow rate of 0.6 specific gravity gas @ 14.7 PSIA, 60˚F Thousand Cubic Feet Per hour 10 PSIG 7 PSIG 5 PSIG 1 PSIG 2 PSIG 1/2 PSIG
60 64
40 PSIG
20 PSIG
15 PSIG
10 PSIG
P289 2" NPT
Inlet Pressure PSIG BAR 18 1.24
20 25 30 35 40 45 50 55 60 65 Flow rate of 0.6 specific gravity gas @ 14.7 PSIA, 60˚F Thousand Cubic Feet Per hour
Vent Screen Installed
0
4
8
12
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