DIN Standard Cast Iron Wafer Butterfly Valve Industrial Usage Manual Flange Centre Sealing

• Customization: Available
• Media: Water
• Driving Mode: Manual
• Model NO.: DN50-DN1000
• Connection Form: Flange
• Structure: Centre Sealing
• Seal Form: Force Sealed
• Valve Stem: Orbit
• Work Pressure: Mid-Pressure (2.5mpa< Pn <6.4mpa)
• Working Temperature: Normal Temperature (-40°C<T<120°C)
• Material of Seal Surface: Soft Sealed
• Valve Body: Sheet Metal
• Standard: DIN
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Transport Package: Plywood Case
• Specification: DN50-DN600
• Trademark: YAOFA
• Origin: China
• HS Code: 8481804090
• Production Capacity: 50000piece /Year

Product Description

Company Profile

Specification

Applications

Definition:
A wafer-type butterfly valve made of cast iron that complies with German Industrial Standards (DIN standards). It controls the on-off of pipeline fluid by rotating the valve disc (0°~90°), suitable for scenarios involving water, gas, particle-containing media, etc.
II. Structure and Working Principle
1. Structural Features
Wafer Connection: The valve body has no independent flange, clamped by flanges on both sides of the pipeline for space-saving and convenient installation.
Cast Iron Body: Made of gray cast iron (GG25) or ductile iron (GGG40), featuring wear resistance and pressure resistance, suitable for medium-low pressure conditions.
Disc Design: Disc-shaped valve disc with rubber lining (soft seal) or metal sealing surface (hard seal) at the edge to ensure sealing performance.
Stem and Drive: The stem penetrates the disc, compatible with manual handles, pneumatic actuators, electric motors, and other driving methods.
2. Working Principle
Opening: The driving device rotates the stem, turning the disc parallel to the fluid direction to conduct the pipeline.
Closing: The disc rotates perpendicular to the fluid direction, fitting the seat seal ring to cut off fluid flow.

After Sales Service

Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Global Support: 24/7 technical assistance and spare parts supply.
Training: On-site or remote operation/maintenance training.

Technical Category	Sub-Item	Detailed Description
I. Structural Design	1. Connection Type	Wafer Type: The valve body has no independent flanges, clamped between pipeline flanges via bolts for compact installation, saving space (distinguished from flanged or lugged types).
	2. Disc Eccentricity Design	- Center Line: Disc axis aligns with the pipeline centerline, suitable for low-pressure, ambient-temperature media (e.g., D71X series). - Single/Double/Triple Eccentric: Reduce friction and enhance sealing via eccentric design, ideal for high-temperature, high-pressure, or abrasive media (advanced models).
II. Sealing Type	1. Soft Seal	- Materials: EPDM (resistant to water/steam/weak acids/bases, -20°C~150°C), NBR (oil-resistant, -20°C~120°C), PTFE (corrosion-resistant, -100°C~260°C). - Features: Excellent sealing, corrosion resistance, temperature ≤120°C (except PTFE). - Applications: Water, gases, weak acids/bases, oils.
	2. Hard Seal	- Materials: Stainless steel (1Cr13/304), carbide (tungsten carbide), Stellite alloy. - Features: High-pressure (up to PN40), high-temperature (≤650°C) resistance, wear-resistant (sealed via grinding/surfacing). - Applications: Steam, high-temperature oils, particle-laden media.
III. Stem Design	1. Structural Design	Single Stem (Mainstream): Vertically penetrates the disc center, straight rod type for easy machining and maintenance. - Double Stem (Rare): Used for large-diameter or special applications to enhance stability.
	2. Material & Surface Treatment	- Material: 304/316 stainless steel (corrosion-resistant). - Surface Treatment: Chrome/nitriding treatment (improve wear and scratch resistance).

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.