Bronze swing type check valve BS5154 PN25 series B, metal disk

specification
• BS5154 PN25 series B
• horizontal or vertical fixing (upward flow only)
• metal seat and swing type metal disc
• bronze (GM) body
• body arrow indicates direction of flow
• ISO7-1 taper thread formally BS EN 10226
• ISO 288G parallel thread formally BS 2779

Material specification:
Body: Bronze (GM)
Body cap: Forged brass (½" to 2") / Gunmetal (2 1/4" to 4")
Disc: Bronze (GM)
Swinger: Brass bar (½" to 1") / Gunmetal (1 1/4" to 4")
Swinger pin: Brass bar
Swinger pin cap: Brass bar (2 ½" to 4")
Nut: Brass bar
Rating disc: Tinned iron sheet