Wafer_Valve.pdf

This document is an Installation, Operation and Maintenance Manual for the Tideflex Series WF-3 Waterflex Check Valve, produced by Red Valve in October 2023. The manual provides comprehensive technical details about a specialized check valve designed for backflow prevention in pipeline systems. The valve operates solely on differential pressure, with positive differential pressure opening the valve to allow flow, while reverse differential pressure closes the valve to prevent backflow. The valve is engineered with a revolutionary design that exhibits low headloss, high backpressure ratings, and a compact face-to-face dimension, intended for clean flow media with fine particulates.

The manual includes detailed technical specifications, including a backpressure ratings table covering pipe sizes from 4" to 48", with corresponding ANSI flange sizes and outside diameters. The document provides critical installation guidance, emphasizing proper valve orientation (membrane must be on the downstream side of the disc), gasket placement, and bolting procedures. It also outlines maintenance protocols, recommending periodic valve inspections and elastomer membrane replacement when necessary. The valve is NSF/ANSI/CAN 61 certified, though certification applies only to certain valve models, requiring confirmation with Red Valve using the specific part and serial numbers embedded in the valve's rubber components.