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Tilting Disc Check Valve

Brief description:

Design Standard: EN12334

Size: DN200-DN1600

Design Pressure:PN10-PN25

Face to Face:EN558 series14

Material:ductile GJS400-15,GJS500-7,stainless steel

Coating:FBE above 250 microns

Operation:lever+Counter weight+hydraulic damper

Inspection and Test Standard:EN 12266,EN1074

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Product Detail

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Product Description

The purpose

This product has double eccentric, rubber to metal sealing system (hydraulic damper device is optional), and can be closed in quick action / slow action two steps. It can be used widely on pump discharge in the piping system. And it is a very important device because it can prevent reverse flow and destructive water hammer when the pump stops normally or accidents come out.

The performance

▪ The disc is of double eccentric design, and the valve opens and closes reasonably.

▪ The rubber ring on the disc can be replaced and the metal seal ring on body has long service life.

▪ Operation is easy.

▪ Size range: up to DN1600; Pressure range: up to 25bar. Other size and pressure are available as special request

▪ Double flanged ends

▪ Short valve body, small volume and light weight

▪ Cast ductile iron body and disc coated with fusion bonded epoxy.

▪ Stainless steel valve shaft, stainless steel body seat ring and replaceable disc seal ring. Other materials are available as special request.

▪ The disc seal ring and shaft seal rings(O rings) could be replaced easily on site. No need special tools.

▪ Self-lubricating shaft bearing, Disc swings freely

▪ Large eccentricity for valve quick closing action

▪ Valve shafts protrude on both sides of body, and allow the lever and counterweight to be mounted freely.

▪ The counterweight is adjustable to adapt the individual working conditions

▪ The external hydraulic damper is available as special request, or individual working conditions

▪ Vertical and horizontal pipeline installation are available.

Standards

Hydraulic tests according to EN-12266-1 Class A

Design to BS EN12334, EN558-1

Flanges to EN1092-2 / BS4504, PN10 / PN16 / PN25

Service Fields

Water and neutral liquid applications

Main transmission pipelines

Irrigation system

Fire fighting

Product Description

The purpose

Tilting disc check valve is one-way valve and non-return valve. It’s also called butterfly check valve, one type of swing check valve. It’s an automatic valve which will open when medium flow forwards and close when medium flow backwards. Its main function is to prevent the reverse flow of the medium, reverse rotation of the pump and powered devices, prevent the water hammer wave generated by the sudden stop of pump failure, and reduce the damage to the pipeline system.

The valve opening is achieved by the media flow and force, and valve closing is depending on the disc dead-weight (if necessary, with external counterweight) and back flow pressure. It’s an automatically operated valve without any extra power unit. The reasonable design of each part will bring reliable and perfect function realization of the valve .

NAME	MATERIAL*	SPECIFICATION
Counterweight	Cast Iron	GJL250(GG25)
Lever	Carbon Steel	1.0038(S235JR)
End Cover	Ductile Iron	GJS500-7(GGG50),GJS400-15(GGG40)
Seal Bush	Stainless Steel	1.4301(SS304)
Shaft	Stainless Steel	1.4021(SS420)
Bearing Bush	Stainless Steel	1.4301(SS304)
Bearing	Stainless Steel Base	1.4301(SS304)+PTFE
O Ring	Rubber	EPDM,NBR
Body	Ductile Iron	GJS500-7(GGG50),GJS400-15(GGG40)
Retainer Ring	Stainless Steel	1.4301(SS304)
Bolt	Stainless Steel	A2-70
Disc Seal Ring	Rubber	EPDM,NBR
Disc	Ductile Iron	GJS500-7(GGG50),GJS400-15(GGG40)
Pin	Stainless Steel	1.4021(SS420)
Key	Stainless Steel	1.4021(SS420)

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