pressure relief valve0 pages

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PRESSURE RELIEF VALVES

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Angle & Straight-Thru Types (150-675 PSIG)

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HENRY

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TECHNOLOGIES

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Type 52 Angle

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Type 523 & 524

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Type 560

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Type 534

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Brass construction set and sealed at the factory; all N.P.T.F. connections are

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American Standard dry-seal tapered pipe threads

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Valves are stamped with catalog number, size, pressure setting, capacity and

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ASME-UV National Board symbol; CRN number and flow arrow

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All N.P.T.F. connections are American standard dry-seal tapered pipe threads

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Consistent operation at marked pressure setting

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These relief valves are designed with HENRY'S "Center Loading Pivot" con-

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cept allowing the piston to reseat squarely to the body seat, thus reducing the

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possibilities of leakage

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Suitable for refrigerants R22, R134a, R404a, R410a, R500, R502 and other

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industrial fluids non-corrosive to brass, monel, steel, Neoprene and Teflon.

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Factory set and sealed

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Temperature rating: -20°F to +160°F

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Orders must specify catalog number, pressure setting, and type of refrigerant

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or fluid with which the valve is to be used; UV/NB certified setting range

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varies with design, see ratings sheet; contact Henry for non-certified setting

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range info.

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Selection of Relief Valves. Most states and municipalities which have

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refrigeration safety codes conform to the "American Standard Safety Code for

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Mechanical Refrigeration (ANSI/ASHRAE 15)." This code and ASME states a

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relief valve setting is not to exceed the design working pressure of the vessel on

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which the relief valve is installed. The discharge capacity required is based on the

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size of the vessel and the refrigerant used. The discharge capacity of relief valves

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varies with the pressure setting. The capacities of Henry Relief Valves at various

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pressure settings are available by calling the Engineering and Technical Assis-

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tance line 1-800-627-5148.

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Whenever conditions permit it is highly advisable to have the relief valve pressure

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setting (which must not exceed the design working pressure of the vessel) at

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least 25% higher than the normal maximum operating pressure for the

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refrigerant used.

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Standard pressure settings (brass): 150, 235, 300, 350, 400,450 PSIG

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Standard pressure settings (steel): 150, 250, 300 PSIG

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Standard pressure settings (High Pressure): 500, 550, 600, 650, 675 PSIG

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Important: Orders must specify pressure setting.

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Certification: Available if requested on purchase order, (-C) suffix,

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i.e. 5600-300-C

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Relief Valve Capacity Ratings: (Pounds per minute) - Henry Relief valves are

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constructed and marked in accordance with the requirements of the ASME

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(Boiler and Pressure Vessel Code Section VIII, Division 1).

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These valves are also approved by many local refrigeration and air conditioning

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codes in the USA and Canada for relief of excess pressure. In addition, these

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valves are stamped with the ASME UV symbol and NB to indicate National Board

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certification as to capacities.

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HENRY® Industrial & Commercial Refrigeration Products 800.96.HENRY

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VALVE ~

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H22

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