Check Valve (NRV)
Description
<br><div style="max-height: 350px;"><p style="padding: 0px; margin-right: 0px; margin-left: 0px;"><span style="padding: 0px; margin: 0px;">Available Models: </span><span style="padding: 0px; margin: 0px;">SD-NRV200FF-D / SD-NRV300FF-D</span></p><p style="padding: 0px; margin-right: 0px; margin-left: 0px;"><span style="padding: 0px; margin: 0px;">Check valve or Non Return Valve allow fluid to flow in one direction only. </span><span style="padding: 0px; margin: 0px;">Large fire protection systems sometimes experience severe water hammer caused by backflow when the automatic control shuts down the fire pump. Where conditions can be expected to cause objectionable water hammer, a listed anti water-hammer check valve should be installed in the discharge line of the fire pump. </span><span style="padding: 0px; margin: 0px;">According to NFPA20, 4.15.6* - A listed check valve or backflow preventer shall be installed in the pump discharge assembly.</span></p><p style="padding: 0px; margin-right: 0px; margin-left: 0px;"><span style="padding: 0px; margin: 0px;">Pacific Tech & Engineering Ltd (PTEL) provides you UL certified check valves manufactured by world class brand - SHIELD.</span></p></div><br><div style="max-height: 350px;"><p style="padding: 0px; margin-right: 0px; margin-left: 0px;"><span style="background-color: transparent;">MODEL: SD-NRV200FF-D / SD-NRV300FF-D</span></p><ul style="padding: 0px 0px 0px 2rem; margin: 0in 0px 1rem;"><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Working pressure: 200 & 300 psi</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Connection ends: Flange to ASME B16.1 Class 125</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Temperature range: 0ºC to 80ºC</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Coating: Fusion bonded epoxy coating internally and externally in accordance with ANSI/AWWA C550</span></li></ul><div style="padding: 0px; margin: 0px; text-align: center;"><span style="padding: 0px; margin: 0px;"></span></div><p style="padding: 0px; margin-right: 0px; margin-left: 0px;"><span style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">MODEL: SD-NRV200CV</span></span><span style="padding: 0px; margin: 0px;"></span></p><ul style="padding: 0px 0px 0px 2rem; margin: 0in 0px 1rem;"><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Working pressure: 200 psi</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Connection ends: Flange to ASME B16.1 Class 125</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Bolted bonnet. Horizontal swing. Renewable seat and disc.</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Temperature range: -29ºC to 66ºC</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Bronze trimed disc, 125 psi steam @232° C,. Non-shock cold water oil or gas.</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Conform to MSS SP-71.</span></li></ul><div style="padding: 0px; margin: 0px; text-align: center;"><span style="padding: 0px; margin: 0px;"></span></div><p style="padding: 0px; margin-right: 0px; margin-left: 0px;"><span style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">MODEL: SD-NRV250CV</span></span><span style="padding: 0px; margin: 0px;"></span></p><ul style="padding: 0px 0px 0px 2rem; margin: 0in 0px 1rem;"><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Working Pressure 250 psi. Cold water pressure (Max. temp. 63ºC)</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Flanged Ends to ANSI B16.1 Class 125</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Ductile Iron Body with EPDM</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Epoxy coated interior / exterior to AWWA C550</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Dual Plate Construction</span></li></ul><div style="padding: 0px; margin: 0px; text-align: center;"><span style="padding: 0px; margin: 0px;"></span></div><p style="padding: 0px; margin-right: 0px; margin-left: 0px;"><span style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">MODEL: SD-NRV200GG-D / SD-NRV250GG-D / SD-NRV300GG-D</span></span><span style="padding: 0px; margin: 0px;"></span></p><p style="padding: 0px; margin-right: 0px; margin-left: 0px;"></p><ul style="padding: 0px 0px 0px 2rem; margin: 0in 0px 1rem;"><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Working pressure: 200, 250 & 300 psi</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Connection ends: Groove to AWWA C606</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Temperature range: 0ºC to 80ºC</span></li><li style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px;">Coating: Fusion Bonded Epoxy Coating in accordance with ANSI/AWWA C550 or painting upon request</span></li></ul></div><br>
