AAP Dual Disc Wafer Check Valve, 4"

This AAP dual disc wafer check valve has a cast iron body, 316 stainless steel discs, spring and shafts, an NBR seat and flange gaskets. It is supplied in 14 sizes from 2" (50mm) to 24" (600mm). A dual disc wafer check valve has two half-discs on a central pin, held shut by a spring. Forward flow pushes them open and the spring closes them as flow stops or reverses. The valve is short and light and fits between two pipe flanges.

The maximum working temperature is 80°C and the cold working pressure is 1,600 kPa (16 bar), with flanges to AS 2129 Table E. The seat and flange gaskets are NBR, which is why the temperature limit is lower than for the Viton seat version. The valve is a wafer type, so it sits between two flanges and the flange bolts clamp it in place.

Where this product is used

• Preventing reverse flow after a pump stops
• Water, oil and gas lines between flanges
• Plant and building services where space is tight
• Pump discharge pipework up to 24"

Features

• 14 sizes from 2" (50mm) to 24" (600mm)
• Cast iron body, 316 stainless steel discs, spring and shafts
• NBR seat and flange gaskets
• Flanges to AS 2129 Table E
• Cold working pressure 1,600 kPa (16 bar), maximum 80°C
• Suits water, oil and gas

Key specifications

Choosing the right option

Choose the size to match your pipe flanges, and check the seat material suits your fluid and temperature.

Related AAP products: AAP Wafer Check Valve, Dual Disc, WCB Body, Viton Seat, ANSI 150, AAP Stainless Steel Wafer Check Valve, Dual Disc, Viton Seat, ANSI 150, AAP Wafer Check Valve, Single Disc, Cast Iron, EPDM Seat, AAP Resilient Seat Swing Check Valve, Flanged, Table E.