Henry Technologies

Henry Technologies - 5252-3/4-400 - Brass Straight-Thru Relief Valve, 3/4" MPT x 3/4" FPT 400 PSI

Item: HEN525234400
MFG: 5252-3/4-400
Reference Only

Please contact your Baker rep.

Description

PRESSURE RELIEF VALVES
The main function of a Pressure Relief Valve is to protect against accidental over-pressure of a pressure vessel due to system malfunction or fire.

Applications
Henry Technologies’ Relief Valves are designed to be used in refrigeration
systems to prevent over-pressure due to system malfunction or excessive
external heat. They are to be used only with refrigerant vapor or gas, where
they are typically installed on the top section of a pressure vessel, i.e. liquid
receiver or suction accumulator.

Most states and municipalities which have refrigeration safety codes conform to the “American Standard Safety Code for Mechanical Refrigeration (ANSI/ASHRAE 15)”. This code and ASME states that the Relief Valve setting is not to exceed the design working pressure of the vessel on which the Relief Valve is installed. The discharge capacity of relief valves varies with pressure setting. The discharge capacity required is based on the size of the vessel and the refrigerant used. See “Determining Minimum Required Discharge Capacity” section for more information, or contact Technical Support at 1-800-627-5148.

Whenever conditions permit, it is highly advisable to have the Relief Valve pressure setting (which must not exceed the design working pressure of the vessel) at least 25% higher than the normal operating pressure for the refrigerant used.

52 series Pressure Relief Valves are suitable for use with HCFC and HFC refrigerants and their associated oils, as well as other industrial fluids noncorrosive to brass, steel and Teflon.

53 and 56 series Pressure Relief Valves are suitable for use with ammonia, HCFC and HFC refrigerants and their associated oils, as well as other industrial fluids non-corrosive to steel, iron and Teflon.

How it works
All Henry Technology Relief Valves are 100% tested and manufactured to guidelines as indicated in ASME Section VIII Division I. Every Relief Valve is calibrated to indicate a pre-determined set pressure, where the valve begins to allow gas or vapor to pass through. The valve will open to a full discharge within 10% over set pressure. After discharge Pressure Relief Valves will blow down and reseat once the pressure falls below the valves set pressure.

Main Features
  • NPT and SAE flare connections
  • Valves fully open before 10% overpressure when taken from the average set pressure
  • Reset pressure ranges typically 10-40% (blowdown) from pop pressure
  • Valves bear individual serial numbers
  • UV-1 pressure test reports available upon request
Technical Specifications
All Henry Technologies PRV’s have a set pressure range +/- 3% of the stamped pressure.

Set pressure range = see tables
Allowable operating temperature = -20°F to +225°F (-29°C to +107°C)

Henry Technologies’ Relief Valves are stamped with the ASME UV symbol and NB to indicate National Board certification as to capacities. Additionally, Pressure Relief Valves are designed and registered for use in Canada.
Please contact Technical Support at 1-800-627-5148 for CRN details and list of approved provinces and territories.

The 52 series Relief Valves have brass valve bodies. The internal parts are made of brass and carbon steel. The 53 series valves have stainless steel valve bodies. Internal parts are made from stainless steel and carbon steel. The 56 series valves have cast or ductile iron valve bodies. The internal parts are made from stainless steel and carbon steel. All valves have Teflon valve seats.

Relief Valve Capacity Ratings
Henry Technology Relief Valves are marked with a discharge capacity in unit lbs-air/min, and marked in accordance with the requirements of the ASME (Boiler and Pressure Vessel Code Section VIII, Division 1). These valves are also approved by many local refrigeration and air conditioning codes in the USA and Canada for relief of excess pressure.

California residents: see Proposition 65 Warning

Features and Specification

Weight 1.030000
Cubic Measurement 0.000300
Length 4.050000
Height 0.380000
Brand Henry Technologies
Composition Brass
Connection Size 3/4"
Connection Type MPT x FPT
UOM EA
Width 0.380000
Warranty Offered Yes
UL Recognized No
UL Listed No