This manual provides installation, operation, maintenance and troubleshooting instructions for Reliable's E-type alarm check valves in 4", 6" and 8" sizes.
The Reliable E-type alarm check valve is designed for fire sprinkler wet‑pipe systems and is available in 4", 6" and 8" (100 mm, 150 mm, 200 mm) sizes. It can be equipped with E‑3 variable‑pressure or constant‑pressure core assemblies and meets UL, FM and other fire‑protection certifications.
The document covers valve overview, core‑assembly description, step‑by‑step installation for vertical and horizontal mounting, operation guidelines, routine maintenance, testing procedures, troubleshooting of false or intermittent alarms, and a complete parts list with ordering numbers. This manual is written in Chinese.
| Rated working pressure | 175 psi (12.1 bar) |
|---|---|
| Factory hydrostatic test pressure | 350 psi (24.2 bar) |
| Flange connection standard | ANSI B 16.1 (125 psi) flanged |
| 4" valve bolt‑circle diameter | 7 ½ inches |
The valve is rated for a working pressure of 175 psi (12.1 bar).
NFPA 25 requires at least an annual inspection, testing, cleaning and part replacement as needed.
The valve can be connected by American standard flange, ANSI B 2.1 threaded opening, or metric flange with sealant.
Open the test connection (valve A) until the mechanical and electronic alarms sound; this verifies the valve and alarm circuitry.