Straight Flow Back

Basic Info.

Material	Plastic
Type	Double Seater
Lead Time	5-10days
Transport Package	Carton
Specification	3" female thread
Trademark	DFS
Origin	Fuzhou

Product Description

TYPICAL APPLICATION
back-flushing control valve can be connected with gravel filter or disc filter into an automatic backwash filtration
system, and it can also change the direction of flow in water supply. The control valve has 2 control chambers, which can be
deformed into angular flow or direct flow through different spring assembly direction. The unique cavity design ensures large
flow volume of water supply:
Auto back-flushing filtrationg system - BDV series back-flushing control valves can be built into an automatic backwash
system with gravel medium filter or disc filter.
Water supply system - Being used in the water supply pipelines to reroute the water flow into angle or straight
flow direction.
FEATURE & ADVANTAGE
• Hydraulic drive diaphragm control valve;
• Unique plastic spool assembly design with tight sealing and corrosion resistance;
• Short stroke of valves stabilizing water flow and avoiding blend of clean and dirty water;
• Corrosion-proof and long lasting PP material;
• Unique cavity design of BDV series ensuring high water flow;
• With an easily dismantled driven system for convenient on production line checking and maintenance;
• Dual-chamber design of BDV series valve with low-voltage drive to effectively protect the diaphragm;
• With the possibility to install changeover joints in the drain of the direct flow valve, from 4 to 3, from 3 to 2,
meeting the demands of small flows.
• With the application of dual chamber design, BDV series providing angular flow and direct flow options, and being free of
installation direction confinement;

• Corrosion-proof materials (additional versions for sea-water and aggressive media available)
• Sturdy body, made of Glass-Reinforced Polyamide (GRP)
• Light weight
• Valve changes position in a frictionless manner
• Simple and easy maintenance
• Easy installation, no special tools or expertise required.
• Special design models for disc and media filtration systems

TECHNICAL DATA

Model	Flow Direction	Connections Sizes	Connections	Volumn in Cavity(L)	Working Pressure(Bar)	Weight(kg)
	Angle	3''x3''x3''	BSP/NPT	1.5	0.7-10	5.5
	Angle	4''x4''x4''	BSP/NPT	1.5	0.7-10	5.5