Thermal Expansion Products
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Table of Contents General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 4 Potable Hot Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Series PLT Potable water expansion tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Series DETA ASME pressurized potable water expansion tanks . . . . . . . . . . . . . . . . . . . . . . . 7 Series LFBRV Combination ball valve and relief valve . . . . . . . . . . . . . . . . . ....

General Information General Information What is Thermal Expansion? When water is heated, it expands. For example, water heated from 90ºF (32ºC) to a thermostat setting of 140ºF (60ºC) in a 40 gallon hot water heater will expand by almost one-half gallon. This is because when water is heated, its density decreases and its volume expands (see fig. 1). Since water is not compressible, the extra volume created by expansion must go someplace. During no-flow periods in a system, pressure reducing valves, backflow preventers, and other one-way valves are closed, thus eliminating a path for...

General Information Plumbing Code Requirements Thermal Expansion Control Plumbing codes require that thermal expansion control be addressed in plumbing systems. A temperature and pressure relief valve is not considered a thermal expansion device. This is because when water is allowed to continuously drip from the T&P relief valve, minerals from the water can build up on the valve, eventually blocking it. This blockage can render the T&P valve useless and potentially lead to hot water heater explosions. The International Plumbing Code (IPC), Uniform Plumbing Code (UPC) and Standard Plumbing...

General Information Expansion Tanks How a Diaphragm Expansion Tank Works When water is heated in a closed system, it expands. Water is not compressible, therefore, the additional water volume created has to go someplace. When an expansion tank is installed, the excess water enters the prepressurized tank (figure 3). As the temperature and pressure reaches its maximum, the diaphragm flexes against an air cushion (air is compressible) to allow for increased water expansion (figure 4). When the system is opened again or the water cools, the water leaves the tank and returns to the system....

Control Thermal Ex­pan­sion in Hot Water Supply Systems Thermal expansion of heated water may occur wherever potable water is heated in a closed sys­em (when the potable water is isot lated from the public water supply by a one-way valve, such as a pres­ ure reducing valve, backflow preventer or check valve). Watts s potable wa­er expansion tanks are de­ igned to absorb the increased volume of water created by ther­ al expansion and to main­ain t s m t a balanced pressure throughout the potable water supply sys­em. They are used to prevent plumbing sys­em and/or water heater t t damage and...

Potable Water Expansion Tanks Models PLT-5, PLT-12, PLT-20, and PLT-35 Series PLT Potable Water Expansion Tanks are designed to absorb thermal expansion and to maintain balanced pressure throughout the potable water supply system. Heated water expands, and in a domestic hot water system, the system may be closed when isolated from the public water supply by a one-way valve, pressure reducing valve, backflow preventer, check valve, etc. Provisions must be made for this expansion. Series PLT expansion tanks absorb the increased volume of water created when the hot water storage tank is heated...

Potable – ASME Series DETA ASME Pressurized Expansion Tanks for Potable Hot Water Models DETA 5 – DETA 210 Series DETA tanks are ASME fixed bladder type precharged ex­ an­ ion tanks for commercial and industrial p s fresh potable hot water ap­ li­ a­ions. They are de­ igned p c t s to accept the expanded volume of hot water keep­ng the i sys­em pressure below the relief valve setting. The wa­ter t is con­ained in a butyl blad­ er. t d Maximum Design Pressure: DETA 5 – DETA 210: 150psi (10.3 bar) Precharged to 40psi (276 kPa) Maximum Design Temperature: 240°F (115°C) Features System...

POTABLE — ASME Potable Series LFBRV Combination Ball Valve and Relief Valves Series LFBRV, Combination LEAD FREE* Ball Valve and Relief Valve is an easy to install two-in-one device. Designed to be used as water heater shutoff valves to provide both a means to shut off the water supply to the water heater and to provide protection against excess water pressure caused by thermal expansion. The Series LFBRV features Lead Free* construction to comply with Lead Free* installation requirements. These valves use a Lead Free* copper silicon alloy body full port valve design** which includes PTFE...

potable Potable Model Governor™80M2 Toilet Fill Valve and Thermal Expansion Relief Valve The Governor™80M2 is a feature rich universal toilet tank fill valve designed to protect plumbing systems and to conserve water. As a fill valve, it is able to detect a leaking toilet flapper and to prevent the tank from continuously refilling until a repair is made. The override feature enables the toilet to continue to be used until the flapper can be replaced. The Governor™80M2 is also a thermal expansion pressure relief valve limiting supply line pressure and protecting plumbing from the damaging...

potable Potable Series LF530C Calibrated Pressure Relief Valves LEAD FREE* Series LF530C Calibrated Pressure Relief Valves are spring operated Lead Free* valves designed for use only as protection from the build up of excessive pressure in systems containing water, oil or air. Series LF530C valves incorporate a calibrated adjustment feature for setting the valve to the relief pressure required. These valves are ideally suited for bypass thermal expansion relief. • alibrated adjustment feature for setting valve to relief C pressure required • djustable range 50 – 175psi (3.4 – 12.1 bar) A •...