P98H Back Pressure Regulator / Relief Valve
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Catalog excerpts

P98H Back Pressure Regulator / Relief Valve The P98H monitors upstream pressure and opens to relieve excess pressure increases above setpoint. As a Back Pressure Regulator, the upstream pressure is monitored and released downstream when the setpoint is exceeded. Applications • Pulp and Paper - Boilers, Heaters, PM Drums • Chemical Boilers, Process Heaters • Water and Waste Water Systems • Steam Injection P98H Part Matrix Specifications BelGAs Spring Range P98H Maximum Body & Bonnet Temp Range Materials of Construction Body, Bonnet, Diaphragm Case Cast Iron Options Steel Stainless Steel Options Neoprene P98H Maximum Diaphragm & Seat Temp Range Monel Valve Plug / Seat Nitrile Valve Plug / SS Orifice Options Metal Valve Plug / SS Orifice

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P98H Back Pressure Regulator / Relief Valve-5

Nominal Body Size, Inches (DN) Pressure Buildup Over Relief Setting, PSIG (BAR) Nominal Body Size, Inches (DN) 655-712-000 655-712-001 655-712-002 655-717-000 Part Number Color Code P98H Flanged Unit Dimension, Inches belgas.net

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P98H Back Pressure Regulator / Relief Valve-6

Kit Includes Part Number FKM Diaphragm, Thru Hole Gasket, 316SS Orifice, 316SS/Nitrile Valve Plug, Seat O-ring Retainer and O-ring, Seat Machine Screw

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P98H Back Pressure Regulator / Relief Valve-7

P98H Back Pressure Regulator / Relief Valve 1-1/2" or 2" The P98H monitors upstream pressure and opens to relieve excess pressure increases above setpoint. As a Back Pressure Regulator, the upstream pressure is monitored and released downstream when the setpoint is exceeded. Applications • Pulp and Paper - Boilers, Heaters, PM Drums • Chemical Boilers, Process Heaters • Water and Waste Water Systems • Steam Injection Spring Range Materials of ConstructionP98H Maximum Body & Bonnet Temp Range Cast Iron P98H Maximum Diaphragm & Seat Temp Range Body, Bonnet, Diaphragm Case

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P98H Back Pressure Regulator / Relief Valve-8

Nominal Body Size, Inches Installation These relief valves may be installed in any position, as long as flow will be in the same direction as that of the arrow cast on the body. P98H Parts 1-1/2" & 2"

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P98H Back Pressure Regulator / Relief Valve-10

P98H Water Relief Capacities with an Elastomer Diaphragm

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P98H Back Pressure Regulator / Relief Valve-11

P98H Steam Relief Capacities with a Stainless Steel Diaphragm A Spring Range Body Size, Inches (DN) Range Part Number Relief Pressure Setting Color Code Pressure Buildup Over Relief Setting, PSIG (BAR) Flow at Relief Setting Light Gray Light Blue Dark Gray A DIVISION OF MARSH BELLOFRAM TRIM RANGE MAX INLET LOT CASING PRESS AT TEMP

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