Ultrasonic Testing - Duration: Sign in to add this to Watch Later. Secondly the closure of one valve reduces the pressure differential across the other, allowing a more reliable seal and avoiding even minor leakage. Water systems function on a water-pressure theory. Please help improve this article by adding citations to reliable sources. May Learn how and when to remove this template message. Views Read Edit View history. This feature is not available right now. Types of Hydraulic Pumps - Duration:
A double check valve or double check assembly (DCA) is a backflow prevention device References. ^ Jump up to: Double Check Detector Assembly article The majority of approved assemblies that may be installed vertically are double check valve assemblies (DC) and double check detector assemblies (DCDA). A double detector check valve provides peace of mind to homeowners as it protects against the harmful effects of backflow in your water system.
Double Detector Check Valve.
Detector Check Assemblies Viking Group Inc.
Sign in to add this video to a playlist. Only used in a backpressure condition.
How to remove a broken bolt 4 different ways! Protects the potable water supply from contamination caused by a cross-connection. TWI Ltdviews.
VBF-DDC-(size DN)RG. Size Range: DN65 – DN; Max. Working Water Temp.: °C – 60°C; Working .
Sign in to make your opinion count. The next video is starting stop. If the hazard is higher, a more reliable check valve system is used, such as a reduced pressure zone backflow preventer. Sign in to report inappropriate content.
Double Detector Check Valve Assemblies – Grooved – Repipe Connection
Enter the double detector check valve. This feature is not available right now.
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|If the hazard is higher, a more reliable check valve system is used, such as a reduced pressure zone backflow preventer.
A Watts Water Technologies Company. How to remove a broken bolt 4 different ways!
Video: What is a double detector check valve How to Test a Double Check Valve Backflow Preventer
Consists of two independently operating check valves, two shut off valves, and bypass assembly with meter. Atmospheric vacuum breaker Air gap Check valve Chemigation valve Double check valve Hydrostatic loop Pressure vacuum breaker Reduced pressure zone device Vacuum breaker.
Double check valve assembly and double check detector assembly procedure require- ments. Viking SupplyNet's extensive inventory of backflow valves and related devices includes Double Check Detector Assemblies, Colt Series C, CN (Ames). The AVG Series Double Detector Check Valve provides double check protection against cross connection of non potable water into a safe drinking.
Sign in to add this video to a playlist. The most common usages of a double detector check valve are on lawn irrigation systems, fire sprinklers, and combi-boiler systems.
Double Check Detector Assemblies
How to remove a broken bolt 4 different ways! Bypass arrangements, jumper connections, removable sections, swivel or change-over devices, and other temporary or permanent devices through which, or because of which, backflow can occur are considered to be cross-connections.
Rating is available when the video has been rented. If the hazard is higher, even a relatively low hazard such as using antifreeze in the fire sprinkler system, then a more reliable check valve such as a reduced pressure zone device may be mandated.
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