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Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

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Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal
Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Large Image :  Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Product Details:
Place of Origin: China
Brand Name: YuGong
Certification: CE,API 607,API 609,ISO,TS,EAC
Model Number: D343H-25C-DN200
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: 100USD
Packaging Details: Select the appropriate wooden crate based on the valve's design
Delivery Time: 20 days
Payment Terms: L/C,D/A,D/P,T/T
Supply Ability: 1000pcs/Mon
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Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Description
NDT: UT,RT,PT,MT Face To Face Standard: ASME B16.10
Stem Packing: PTFE,EPDM,WCB,SS,Graphite,Hard Treatment(Stellite,Cr),Low Leakage,Lip Seal,etc. Size: DN50-DN1600
Operator: Manual,Pneumatic,Hydraulic,Electric Test & Inspect Standard: API 598,EN 12266,GB/T13927

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Product Features

     The PN25 DN200 flanged triple-eccentric multi-layer butterfly valve precisely addresses the core challenges of general-purpose medium-pressure applications. Featuring a WCB carbon cast steel body that withstands pressure across the entire operating range, it incorporates a multi-layer sealing structure with a gradient combination of rigid and flexible materials. Combined with an integrated flange rigid connection, a heavy-duty worm gear for effortless operation, and three-dimensional triple-eccentric frictionless opening and closing technology, it delivers “no deformation under pressure, zero leakage at full pressure, and low wear during long-term use” in the 25 kg pressure range, making it the durable, top choice for medium-pressure, small-to-medium-diameter pipelines that balance reliability and cost-effectiveness.


Product Advantages

    ● It employs a multi-layer composite sealing structure with alternating “rigid metal skeleton layers + flexible sealing layers,” optimized for gradient pressure distribution in PN25 medium-pressure applications, thereby overcoming the performance limitations of single-seal designs. Under low-pressure conditions, the flexible sealing layer achieves a tight, full-circumferential seal through elastic deformation, resulting in bubble-level zero leakage and resolving the common issue of micro-seepage in pure hard seals at low pressures. As pressure rises to the PN25 rated value, the metal rigid layer gradually assumes the primary sealing contact pressure, effectively resisting the compressive loads associated with medium pressure and avoiding the shortcomings of pure soft seals—such as collapse under high pressure, cold flow deformation, and rapid aging.

   ● It employs a proven three-dimensional triple-eccentric design, which builds upon the dual-eccentric configuration (stem eccentricity + disc eccentricity) by adding sealing cone angle eccentricity, resulting in triple-track optimization. The double-eccentric structure allows the butterfly disc to first move radially away from the sealing surface upon opening, significantly reducing the friction stroke and minimizing sealing surface wear at the fundamental level; the third-level conical angle eccentricity further reshapes the butterfly disc’s rotational path, ensuring that throughout the entire opening and closing process, the sealing surface remains completely separated from the valve seat—with zero contact and zero scraping—and only makes precise conical contact at the instant of full closure.

   ● To address opening and closing resistance under medium pressure differentials at PN25, the worm gear transmission ratio has been specifically optimized. A heavy-duty reduction transmission structure is employed to achieve higher torque amplification efficiency. A single operator can easily complete the full 0–90° opening and closing cycle and fine-tune the valve position by turning the handwheel. The operating torque is uniform and smooth, with no stuttering or dead spots, effortlessly overcoming the resistance of the butterfly disc under medium-pressure conditions.


Design Standards

Technique request

Standard

Design Standard

API 609, ASMEB16.5,EN593,GB/T12238,JB/T8527

Face to Face Standard

ASME B16.10

Connection standard

ASME B 16.5,ASME B 16.47,GOST33259,EN1092-1,HG/T20592,JIS B2220,GB/T9113,GB/T9124.1

Test & Inspect Standard

API 598,EN 12266,GB/T13927

Nominal Dimension

2”- 100

Connection type

BW, RF, RTJ. FF

Fungtive Emission Testing

 ISO 15848



Product detail 

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal


Application

    Chemical and Petrochemical Industries,Power Generation, Water Treatment and Environmental Protection,Metallurgy and Shipbuilding.


About Us

Zhejiang Yugong Fluid Technology Co., Ltd. is a comprehensive high-tech enterprise integrating production and sales. The company manufactures and operates professional butterfly valves made of stainless steel, carbon steel, titanium and other materials. Founded in 2012, the company is located in Yongjiao Oubei, the "hometown of pumps and valves in China", covering an area of 4,000 square meters and has more than 80 employees. Aiming high and forging ahead, the company looks forward to working hand in hand with new partners and walking all the way!

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Our Workshop

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal

Mine Drainage PN25 DN200 WCB Cast Worm Triple Offset Butterfly Valve Flanged Hard Seal


F&Q

Q: Are you trading company or manufacturer ?
A: We are a factory.
Q: How long is your delivery time?
A: According to the order,10~60days.
Q: Do you provide samples ? Is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A:  30% T/T in advance ,balance before shippment.

Customer Service

  1. Before signing an official contract with our customer we will help to analyze and provide professional solution based on customer project information and come out with optimum solution.
  2.  Your inquiry related to our products or price will be replied in 24hrs.
  3. Keep informing our customer production process and help arrange quality checking in the factory if necessary.
  4.  one-year warranty toproducts.




Contact Details
Zhejiang Yugong Fluid Technology Co., Ltd

Contact Person: Ms. Ye

Tel: 19906502611

Send your inquiry directly to us (0 / 3000)