Backflow Preventers

• 

Festures of Backflow Preventers

The double check valve is designed as a whole, with small structure；

Body is streamlined with little resistance loss；

Combination of a double check valve and safety drain valve can completely prevent backflow pollution under any working condition；

All moving parts are made of non-rust and wear-resistant materials with long service life.

Backflow Preventers Working Principle

Backflow preventers for two check valve series, when one of the seal damage, the other also ACTS as a seal to prevent backflow. However, when the sealing oftwo check valvesis broken at the same time, the check function is lost. Backflow preventers on the common type of foundation in the middle of the drain, so even if two check valve sealing at the same time damage, it can also play a role in preventing backflow pollution.

Backflow Preventers Installation and Commissioning

This valve must be installed horizontally, the environment of the installation site should be clean, there should be sufficient maintenance space, the main degree of safety drain or (air barrier) outlet is more than 300mm above the ground, and it should not be flooded by water or debris, and the installation area should be equipped with drainage facilities. For specific use, please consult ZECO Valve Group.

Backflow Preventers Material and Standard

Size Range: 2"~12"

Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: AMSE B16.10, EN558-1

Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2

Coating: Fusion Bonded Epoxy Coating

Inspection and Test: ISO 5208 / EN 12226-2

ZECO Valve Group is an experienced valve manufacturer. We provide china valve, water valve, 2.5 inch backflow preventer, double backflow valve, 4 double check backflow preventer, 6 rpz backflow preventer, rpz backflow prevention, 3 inch backflow valve, etc. Contact us to know where to buy backflow preventeror more.

There are many backflow preventer suppliers, but we are one of the best choices for you.

Other supplier products

	Pressure Relief Valve	Festures of Pressure Relief Valve Accurate Pressure Control Fast Opening to Maintain Line Pressure Slow Closing to Prevents Surges Comp...
	Gate Valve	The resilient seated gate valveof ZECO is widely used and reliable in the water supply and drainage system of water supply company, sewage company,...
	Bronze Adjustable Dynamic Flow Balancing Valve	ZECO is one of the leading check valve manufacturers china, China. ZECO check valveprovides non-slam closure, have a low head loss and close drip-t...
	Forged Steel Valve	Forged Valve ZECO forged valve refers to the blank of valve, which is a forging piece with certain mechanical properties, shape and size produced b...
	3 Inch Ball Valve	Description of 3 inch stainless steel ball valve: ZECO3 inch ball valveis usually a floating ball valve, the material can also be divided into cast...

Same products

	Combination angle valve	Seller: Zhejiang Huaqi Information Technology Co., LTD	Meet our Brass Angle Ball Valve, a versatile and reliable solution for controlling fluid flow in ...
	Multifunctional hydraulic control valve	Seller: FLUID TECH PIPING SYSTEMS (TIANJIN) CO.,LTD	Features: Size: 2"-24”(DN50-DN600) Material: Ductile iron ASTM A536, 65-45-12 Dimension:...
	Fire Protection Grooved Butterfly Valve	Seller: FLUID TECH PIPING SYSTEMS (TIANJIN) CO.,LTD	Features: Code：D81X4 Size: 2"-12”(DN50-DN300) Material: Ductile iron ASTM A536, 65-45-12...
	Dry Ash Gate Valve	Seller: China Valve Industry Co., Ltd.	The dry ash gate valve is designed for both inlet and outlet pipelines. It features...
	China factory High temperature double head bolt 2""-8UN Steam Turbine RSV N for power station	Seller: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD	"China factory High temperature double head bolt 2""-8UN Steam Turbine RSV N for power stationOur...