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The pressure relief valve type 2117 is designed to protect pressurised fluid systems against over-pressurisation in unvented (pressurised) water heaters. The connection size has to be determined in accordance with the heating capacity of the heat-generating device to be protected. The opening pressure of the pressure relief valve indicated on the black seal pressed in the lifting handle of the valve has to be at least 20 % below the highest permissible inlet pressure of the system to be protected.
The operational parts in the pressure relief valve type 2117 are protected against direct contact with the medium (protection against corrosion). The pressure relief valve can be lifted by means of the rotatable handle.
The body and the internal parts are made of a high-quality low-lead brass alloy. The spring cap is made of high-quality glass fibre reinforced synthetic material or zinc die-casting. The diaphragm and the seat are made of heat and ageing resistant elastomeric synthetic material and the spring of corrosion protected spring steel wire.
Opening pressure: 3.0 bar.
Size: ½’’ (in) x ¾’’ (out)
Mounting position: preferably main axis vertical, inlet connection pieces facing downwards Components approval number: TÜV-SV-15-545-DN-W-N-p Media: water, neutral non adhesive fluids.
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