Butterfly Type Stop Flange Check Valve Wafer 316/304 Strainless Steel Ss/Cast Iron Disc Dual Plate

• Customization: Available
• Media: Oil,Gas,Water
• Temperature: Ordinary Temperature
• Model NO.: DH77X-10/16/25Q/125/150LB/5K/10K/16K
• Type: Direct-acting
• Material: Cast Iron
• Connection Form: Wafer
• Pressure: Low Pressure
• Actuator: Manual
• Seal Surface: Rubber
• Thread Position of Valve Rod: Outside Gate Valve
• Usage: Regulation
• Standard: GB
• Application: Industrial Usage, Water Industrial Usage
• Transport Package: Plywood
• Specification: DN32~DN1200
• Trademark: non
• Origin: China
• HS Code: 8481804090
• Production Capacity: 50000PCS/Month

Product Description

Introduction

Applications
Industrial Pipelines:
Water/wastewater treatment plants (compliant with EN 50285).
Chemical processing (corrosion-resistant materials per ISO 15156).
Power generation (steam and condensate systems).
Oil & Gas:
Upstream/downstream applications (NACE-compliant materials for sour gas).
Offshore platforms (DNV GL certification available).
HVAC & Plumbing:
Chilled water systems (NSF-listed for potable water).
Fire protection systems (FM/UL approved models).
Marine & Naval:
Bilge and ballast systems (compliant with IMO MSC.1/Circ.1378).
Installation and Maintenance
Installation:
Mount between flanges with matching bolt holes (per ANSI B16.5 or ISO 7005).
Ensure correct flow direction (marked on the valve body).
Avoid vertical installation in low-flow scenarios to prevent disc sagging.
Maintenance:
Regularly inspect seals for wear (replace per manufacturer guidelines).
Lubricate shafts annually for metal-seated valves (use food-grade grease for sanitary applications).
Test for leakage using procedures in API 598 or ISO 5208.

Specification

Design Advantages:
Space-Saving: Wafer design reduces overall length compared to flanged check valves.
Rapid Closure: Minimizes water hammer effects in high-velocity systems.
Bi-Directional Options: Some models allow flow in both directions with dual-disc configurations (e.g., for pulsating flow applications).
International Standards Compliance
This valve meets multiple global standards for design, materials, testing, and performance:

Design & Dimensions:
ANSI/ASME B16.34: Pressure-temperature ratings for valves.
ISO 5752: Face-to-face dimensions for industrial valves.
ANSI B16.5 (ASME B16.5) / ISO 7005-1: Flange connections (RF, RTJ, or flat face).
Testing & Performance:
API 598: Factory hydrostatic and seat leakage testing.
ISO 5208: Performance requirements for valve leakage (bubble-tight shutoff for Class VI in soft-seated valves).
EN 12266-1: Testing of metallic valves—pressure testing, fatigue, and endurance.
Industry-Specific Standards:
API 609: Butterfly valves for general service (covers check valve variants).
ASME B31.3 (Process Piping): Compliance with chemical plant piping codes.
ANSI 61: Drinking water applications 

Packing 

shipment

containers

Drawings & Dimensions

Detailed CAD drawings and dimensional diagrams are available for download here or upon inquiry. Our engineering team can provide tailored designs to meet specific project requirements.

After Sales Service

Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Extended Warranty: Optional coverage up to 36 months.
Global Support: 24/7 technical assistance and spare parts supply.

Why Choose Us?

Other Products

OEM/ODM capabilities
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
Turnkey project solutions

globe valve
check valve
strainer
flanges
ball valve

FAQ

Q: What’s the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.