Stop Check Valve

Size Range

DN50 to DN600

Pressure Class

PN10 / Class 150 to PN420 / Class 420

Standards

API 6D, API 602, ASME B16.34, GB/T 12235, ASME B16.10, GB/T 12221, API 598, GB/T 13927, GB/T 12224, Flange Standard: ASME B16.5, GB/T 9113, Butt Weld Standard: ASME B16.25, GB/T 12224, Fire Safe: API 607, Pressure-Temperature Rating: ASME B16.34, GB/T 12224

End connection

ASME B16.5 flange · GB/T 9113 flange · Butt weld ASME B16.25 / GB/T 12224

Available sizes

Standard DN sizes covered by this product. Confirmed at quote.

Configure your variant(manually adjust box on the right if you require a different spec)

Size

DN50 (2")DN65 (2 1/2")DN80 (3")DN100 (4")DN125 (5")DN150 (6")DN200 (8")DN250 (10")DN300 (12")DN350 (14")DN400 (16")DN450 (18")DN500 (20")DN600 (24")

Pressure

PN10PN16PN25PN40PN64PN100PN160PN250PN320PN400Class 150Class 300

End connection

ASME B16.5 flangeGB/T 9113 flangeButt weld ASME B16.25 / GB/T 12224

Materials

All available material options per part. Click a pill to set it in the configurator.

body

Carbon SteelStainless SteelAlloy Steel

disc and seat sealing surface

Iron base alloy (surfacing)Stellite cobalt base carbide (surfacing)

Features

• Dual function: operates as a stop valve when stem is lowered and as a check valve when stem is raised
• Stem and disc are not mechanically fixed, enabling independent check valve action
• Disc and seat sealing surfaces are hard-faced with iron base alloy or Stellite cobalt base carbide
• Sealing surface provides wear resistance, high-temperature resistance, corrosion resistance, and extended service life
• Lower disc-to-seat friction compared to gate valve, improving wear resistance
• Reduces installation cost and space on lines requiring both stop and check functions
• Size range NPS 2" - 24" (DN50-DN600)
• Pressure rating Class 150-420 / PN10-420
• Temperature range -60 °C to +538 °C

Description

A multi-purpose cast valve that functions as both a stop valve and a check valve, with a structure similar to a globe valve in which the stem and disc are not mechanically fixed to one another. When the stem is lowered the disc is pressed onto the seat acting as a stop valve; when the stem is raised the valve operates as a check valve. The disc-to-seat friction is lower than that of a gate valve, providing improved wear resistance.

Available pressure classes

Pressure classes this product is rated to.