Watts WATTS - 118946

Watts 0342691 30 PSI Pressure Relief Valve User Manual

Model: WATTS - 118946

Sarrera

This manual provides essential information for the proper installation, operation, and maintenance of the Watts Series 335 ASME rated Boiler Pressure Relief Valve. This valve is designed for hydronic systems, specifically for boilers up to 510,000 BTU at a 30 PSI (2.11 bar) set point. Its compact, all-bronze construction makes it suitable for various OEM boiler applications.

Watts 30 PSI Pressure Relief Valve, front view

1. irudia: Aurrealdea view of the Watts 30 PSI Pressure Relief Valve, showing the bronze body and the pressure relief lever.

Segurtasun Informazioa

Always follow local codes and regulations during installation and maintenance. Ensure the system is depressurized and cooled before attempting any work on the valve. Wear appropriate personal protective equipment (PPE).

Konfigurazioa eta Instalazioa

The Watts 0342691 Pressure Relief Valve is designed for straightforward installation. It features a 3/4-inch female threaded inlet and a 3/4-inch FNPT outlet.

  1. Prestaketa: Ensure the boiler system is completely shut down, depressurized, and cooled. Drain any water from the system if necessary.
  2. Kendu balbula zaharra (hala badagokio): Carefully unthread the existing pressure relief valve from the boiler.
  3. Hari-zigilatzailea aplikatu: Apply an appropriate thread sealant (e.g., PTFE tape or pipe dope) to the male threads of the new Watts valve.
  4. Balbula berria instalatu: Thread the new valve into the boiler's pressure relief valve port. Tighten securely with a wrench, ensuring not to overtighten.
  5. Connect Discharge Piping: Attach appropriate discharge piping to the valve's outlet. This piping must be sized correctly and routed to a safe discharge point, preventing scalding or property damage.
  6. Sistemaren berpresioa: Slowly re-pressurize the boiler system and check for any leaks around the newly installed valve and connections.
Watts 30 PSI Pressure Relief Valve, side view

2. irudia: Aldea view of the Watts 30 PSI Pressure Relief Valve, showing the compact design and connection points.

Funtzionamendu-printzipioak

The Watts 0342691 is an automatic pressure relief valve designed to protect hydronic heating systems from over-pressurization. It is factory-set to open at 30 PSI (Pounds per Square Inch). When the system pressure exceeds this set point, the valve will automatically open, discharging water to relieve the excess pressure and prevent damage to the boiler or system components. Once the pressure drops below the set point, the valve will automatically close.

The valve also features a manual test lever. This lever allows for periodic manual testing of the valve's operation. When the lever is lifted, the valve will open, discharging water. It is important to exercise caution when using the test lever, as hot water may be discharged.

Mantentzea

Regular maintenance ensures the longevity and proper function of your pressure relief valve.

Arazoak konpontzea

ArazoaKausa posibleaIrtenbidea
Valve constantly dripping or leaking
  • Sistemaren presioa altuegia
  • Sediment or debris under the seat
  • Worn or damaged internal components
  • Improper installation (e.g., insufficient thread sealant)
  • Check system pressure; ensure it is below 30 PSI.
  • Briefly lift the test lever to flush out debris.
  • If leaking persists, the valve may need replacement.
  • Re-install with proper thread sealant if leak is from threads.
Valve does not open when pressure is high
  • Valve seized due to corrosion or lack of use
  • Incorrect valve installed (wrong pressure setting)
  • Attempt to operate the manual test lever.
  • If it remains seized, the valve must be replaced immediately to prevent system damage.
  • Verify the valve's pressure rating matches system requirements.

Zehaztapenak

Watts 30 PSI Pressure Relief Valve with dimensions shown against a hand

Figure 3: The Watts 30 PSI Pressure Relief Valve demonstrating its compact size, approximately 2.9 inches (7 cm) in height.

AtributuaBalioa
Modelo zenbakiaWATTS - 118946
MaterialaBrontzea
Sarrerako konexioaren tamaina3/4 hazbetekoa
Sarrerako konexio motaEme Haridun
Entxufearen konexioaren tamaina3/4 hazbetekoa
Irteerako konexio motaFNPT
Funtzionamendu-presio maximoa30 PSI (2.11 bar)
BTUren balorazioa510,000 BTU arte
Portu kopurua2
Neurriak (L x W x H)3 x 2.3 x 1.8 hazbete
Pisua0.01 ounces (Note: This seems unusually low, likely a data entry error in source. Actual weight for such a valve would be higher.)
Zehaztapena MetASME Section IV

Bermearen informazioa

Specific warranty details for this product are not provided in this manual. Please refer to the manufacturer's official website or contact Watts customer service for current warranty terms and conditions.

Laguntza eta Harremana

For technical assistance, replacement parts, or further information, please contact Watts customer support or visit their official webgunea.

Watts Official Webgunea: www.watts.com

Watts Store on Amazon: Visit the Watts Store

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