2 in (50 mm) Dual Disc Wafer Check, Viton, ANSI 150 | VWCCS15050

This AAP dual disc wafer check valve has a WCB cast steel body, 304 stainless steel discs and a Viton seat. It is supplied in 3 sizes from 2 in (50 mm) to 4 in (100 mm).

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. AAP does not state which mounting positions the valve suits, so confirm the orientation with AIMS if the valve is not going in horizontal pipework.

AAP gives a maximum working temperature of 150 degrees C and a cold working pressure of 1,965 kPa (19.65 bar), with flanges to ANSI B16.5, and lists the valve for water, oil, gas and high pressure liquids (all manufacturer-stated). AAP lists the body as WCB, the disc as 304 stainless steel and the seat as Viton, and does not list the spring or shaft materials.

Where this product is used

• Preventing reverse flow after a pump stops
• Water, oil and gas lines between ANSI 150 flanges
• Higher temperature duty than an NBR seat allows
• High pressure liquid lines, as listed by AAP

Features

• 3 sizes from 2 in (50 mm) to 4 in (100 mm)
• WCB body, 304 stainless steel discs, Viton seat
• Flanges to ANSI B16.5, ANSI 150 (manufacturer-stated)
• Cold working pressure 1,965 kPa (19.65 bar), maximum 150 degrees C (manufacturer-stated)
• Listed for water, oil, gas and high pressure liquids (manufacturer-stated)
• 3 sizes: 2 in, 3 in and 4 in

Materials

Key specifications

Options and part numbers

L is the length of the valve between flanges. AAP does not define D and D1 in text: D appears to be the outside diameter of the valve body and D1 an inner diameter, so check both against your flanges before you order.

Selecting the right option

Choose the size to match your ANSI 150 flanges, and check that Viton suits your fluid. AAP also lists a cast iron version with an NBR seat for AS 2129 Table E flanges (manufacturer-stated) and a full stainless steel version.

Related products

See also AAP Wafer Check Valve, Dual Disc, Cast Iron, NBR Seat, AAP Stainless Steel Wafer Check Valve, Dual Disc, Viton Seat, ANSI 150, AAP Wafer Check Valve, Single Disc, Cast Iron, EPDM Seat and AAP Resilient Seat Swing Check Valve, Flanged, Table E.