The Double Check Valve Assembly (DCVA) is used for a typical large business, condominium or high-rise building. The Double Check Detector Assembly (DCDA) is installed on a line that supplies water to the building’s fire suppression system, which includes the …

This article discusses underground and above-ground installations of a double-check valve assembly. Before installation, run the main irrigation supply line from the isolation valve to the vicinity of the DCVA valve box. Temporarily seal the end of the pipe to keep out soil and debris.

A Double Check Valve Assembly (DCVA) is a device that is used to prevent backflow in a water distribution system. It consists of two independent check valves that are connected in series and a testable auxiliary valve. The DCVA works by allowing water to flow in one direction, while preventing it from flowing in the opposite direction.

2025年1月29日 · A double check valve assembly consists of two independently acting check valves installed in series. These check valves are spring-loaded, allowing water to flow in only one direction – towards the potable water supply. The primary function of a DCVA is to prevent backflow caused by a relatively low back pressure in the system.

2024年10月11日 · One common type of backflow prevention device used in various applications is the double check valve assembly (DCVA). In this blog, we'll explore what a DCVA is, how it works, and why it's a reliable solution for backflow prevention1.

The DCVA is acceptable backflow protection for low health hazards only and is predominantly used in irrigation systems and fire systems. Many water purveyors require that as a minimum, a DCVA be installed on the water service line to all commercial water uses, and residences with in-ground irrigation systems.

2024年4月5日 · Among these devices, the Reduced Pressure Zone (RPZ) and Double Check Valve Assembly (DCVA) are commonly employed, each with distinct features and applications. This blog aims to unravel the differences between RPZ and DCVA, shedding light on their unique characteristics, usage contexts, and the late

2019年7月2日 · The double check valve device assembly (DCVA) is a backflow prevention device used for backflow prevention of low hazard non-potable water into a potable water system or to separate two potable water system. It consists of two independently acting spring load closed check valves and four test cocks.

The DCVA is effective against backflow caused by backpressure and backsiphonage and is used to protect the water system from pollutants that would not constitute an actual health hazard, but that might be objectionable to the water supply system. The DCVA is used to isolate non-health hazards (see Figure 2-15).

2019年7月2日 · The check valve loading is a critical part of the design of the DCVA. The DCVA is predominately used on fire protection systems and it is important to keep the pressure losses to a minimum. A spring loaded at 5 PSI would provide more closing force but would also create a greater pressure loss.