NSW API 6D Swing Check Valve – Class 150–2500, WCB/CF8M Body, Bolted or Pressure Seal Cover

ReflowX SKU: REF-0061

Product Details

Quantity

500
Availability (Lead Time)

4-6 Weeks
Product Location

China
Condition
OEM

WENZHOU NEWSWAY VALVE CO. LTD
Equipment code

Get Quotation Whatsapp

Short Description

Swing-type check valve per API 6D, available in sizes 2" to 48", Class 150–2500. WCB, CF8M, or duplex stainless steel body with RF, RTJ, or BW connections. Features bolted or pressure seal cover and rocker-type disc for one-way flow protection.

Description

NSW API 6D Swing Check Valve – Class 150–2500, WCB/CF8M Body, Bolted or Pressure Seal Cover

The NSW API 6D Swing Check Valve is a robust, full-bore or reduced-bore non-return valve designed to allow unidirectional fluid flow while preventing backflow in process pipelines. Built to API 6D and BS 1868 standards, it is engineered for high-integrity applications in oil & gas, petrochemical, power generation, and industrial fluid systems.

This valve employs a rocker-arm swing mechanism enclosed entirely within the body. The disc swings open with forward flow and closes automatically on reverse flow. A spherical joint between the disc and rocker ensures 360° freedom of movement, allowing slight alignment adjustments for optimal sealing. The body is offered in cast carbon steel, stainless steel, or high alloy materials, and end connections include RF/RTJ flanges or butt welds as per ASME standards.

Options include bolted covers for easy maintenance or pressure seal bonnets for high-pressure applications. Fire-safe construction, NACE compliance, and non-destructive testing options ensure suitability for critical isolation duties across a wide range of fluids, including water, oil, steam, acids, and oxidizing media.

Specifications:

– Valve Type: Swing Check Valve (Non-Return Type)
– Operation: Automatic (non-actuated, flow-responsive)
– Size Range: NPS 2" to NPS 48"
– Pressure Class: 150#, 300#, 600#, 900#, 1500#, 2500#
– Bore Options: Full Bore / Reduced Bore
– Cover Type: Bolted Cover / Pressure Seal Cover
– Body Materials:
– Cast Carbon Steel: ASTM A216 WCB
– Stainless Steel: ASTM A351 CF8, CF8M, CF3, CF3M
– Low-Temp Carbon Steel: A352 LCB, LCC, LC2
– Duplex & Super Duplex: A995 4A, 5A
– Special Alloys: Monel, Inconel, Hastelloy, UB6
– Disc Design: Rocker Arm with Spherical Hinge
– End Connections:
– Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ) Flanges (ASME B16.5 / B16.47)
– Butt Weld (ASME B16.25)
– (NPS 22 flange per MSS SP-44)
– Face-to-Face Dimensions: API 6D, ASME B16.10
– Design Standards: API 6D, BS 1868
– Testing Standards: API 598, API 6D
– Fire Safe Design: API 6FA, API 607
– Optional Compliance:
– NACE MR-0175 / MR-0103
– ISO 15848 (Fugitive Emissions)
– Non-Destructive Tests: PMI, UT, RT, PT, MT
– Installation Orientation: Typically horizontal (recommended)
– Media Compatibility: Water, steam, crude oil, refined petroleum, nitric acid, acetic acid, oxidizers, urea
– Applications: Oil & gas pipelines, chemical plants, power stations, fertilizer and pharmaceutical industries
– Temperature Range: Based on material, typically -46°C to +200°C

For further specifications or to inquire about this equipment and ReflowX's logistics services, Please contact ReflowX at info@reflowx.com

Technical Details

General Terms

ReflowX and the seller retain the right to evaluate and approve offers.
Buyers should verify quantities and conditions upon delivery.
After successful engagement, both buyer and seller manage communication for payment terms and delivery schedule.
All parties agree to adhere to ReflowX Terms and Conditions in transactions.
Buyers can request value-added services such as pre-purchase inspections, Expediting & Delivery Services through ReflowX. Contact us!