Set up in 1995, Tonglu Valves Manufactring Co.,Ltd. is one of the leading China non return valve manufacturer and supplier in Yongjia County of Zhejiang Province. We manufacture all products strictly conforming to the API, JIS, ANSI, BS, GB, NF and DIN standards. Our oem non return valves are available to users on request and are used for municipal works, petroleum, chemical industry, power station, metallurgy, national defense, and scientific research fields.

Body seatring and disc machined to close Tolerances providing smooth action and accurate seating
Low centre of gravity in the disc ensures prompt return of the disc to its seat against the back pressure.
Screwed in Seatring is replaceable.
Stellited seatring and disc can also be offered on special request.
In built wear life for long duration in service.
Single Check Valve with cast iron body - epoxy coated for protection of drinking water systems.
A stainless steel spring closing mechanism allows the valve to operate in any orientation and is immune to water hammer. Water tight closure is achieved by a nitrile rubber seat. The most common application is fire protection systems without additives.The low headloss characteristics are ideal for non return valve applications such as on the inlet or outlet from a pump.This valves takes 1.5" pressure pipe or 1.5" standard solvent weld waste pipe with reducing bushes not supplied

This valve is designed for koi ponds - having a non return plastic flap rather than a metal spring and ball as in domestic valves. It is durable and safe for use with salt and medications as there is no metal to come into contact with the water. This one way check valve is ideal for use in any situation where water may siphons back to the pond on a pump fed system.Used prior to Mechanical bay on pump fed filter, it stops the waste from siphoning back from the first chamber into the pond.Used in line with a water pump it keeps the pump primed with water at all times.Used prior to an electric heater it ensures that the heater remains primed with water. This is necessary to avoid failure by running dry.This valve provides the koi keeper with peace of mind as well as ensuring that costly heaters etc will not be ruined by running dry.

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