The two-position three-way backwash diaphragm valve is a direct diaphragm-sealed valve with a valve body made of glass fiber reinforced polyamide, specifically designed and manufactured for automatic backwash filter systems.

Working principle

Filtration mode: Wastewater flows directly through the outlet to the filtration unit.

Backwash mode: The inlet of the filtration unit is closed, and the drain port is opened. Clean water from other filtration units reverses flow to clean and discharge the filtration unit.

Main performance

? Low head loss

? High valve body strength, made of glass fiber reinforced polyamide

? Strong corrosion resistance, suitable for sewage treatment, seawater, or reclaimed water circulation systems

? Friction-free operation throughout the entire working process

? Easy installation and online maintenance, no need to disassemble from the pipeline

? Rapid backwash action, quick switching of water flow direction

Threaded or bayonet connection, easy installation and modification of existing manual filters

Parameters

Standard pressure rating: 10 bar (PN10) or PN16

Minimum working pressure: 0.7 bar

Specifications: 3”, 4”

Valve body/Valve cover: Polyamide

Valve stem: 304/316 stainless steel

Spring: 304/316 stainless steel

Bolts: 304/316 stainless steel

Sealing ring: Natural rubber, EPDM

Diaphragm: Natural rubber, EPDM

Recommended brands for imported two-position three-way backwash diaphragm valves

1. Dorot (Israel)

Features: Specializes in diaphragm valves and automatic control valves, widely used in water treatment, irrigation, and industrial fields.

Products: Provides three-way diaphragm valves suitable for backwash, diversion, or mixing applications, with strong corrosion resistance.

2. Bermad (Israel)

Features: Products include high-performance diaphragm valves suitable for water treatment and industrial processes.

Products: Three-way backwash diaphragm valves support automatic control with good sealing performance.

3. RETZ (USA)

Features: Specializes in producing water control valves, including diaphragm valves, check valves, etc.

Products: Three-way diaphragm valves can be used in backwash systems with various materials (such as EPDM, NBR diaphragms). Products cover agricultural, municipal, and industrial fields with high cost-effectiveness.