DIN F4 Carbon Steel Flexible Wedge Gate Valve

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Product Details

NSV Flexible wedge gate valves are widely used in the industries of oil, chemical, medicine-made, fertilizer, electrical power, etc. as on/off control valves for passing or cutting off the medium. The gate is designed as a wedge flexible gate of easy seal and wearing compensation, seal surface is overlaid with wearing resistant hardened alloy; the seat seal surface overlaid with wearing resistant hardened alloy to be matched with gate seal surface; the stem is specially treated to ensure its strength, rigidity, corrosion resistance and abrasion resistance. Our gate valve is with reliable seal, safe use and easy operation. Valves are available in a complete range of body/bonnet materials and trims, which are used for the medium of water, steam, oil product, nitric acid, acetic acid, etc.

Applicable Standard
Design Standard: API 600, BS1414, DIN3352
Face to Face: ASME B16.10, EN 558, DIN3202
End Flange: ASME B16.5, ASME B16.47, DIN2533
Butt welding Ends: ASME B16.25, DIN3239
Inspection and Test: API 598, DIN3230

Products Range
Size: 2" ~ 60"(DN50 ~ DN1500)
Rating: ANSI 150lb ~ 2500lb
Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Trim: Per API 600
Operation: Handwheel, Gear, Electric, Pneumatic, Hydraulic

Design Features
Full port design
OS&Y, outside and screw
Bolted bonnet, back seal structure
Flexible wedge, fully guided
Choice of Solid or split wedge
Renewable or welded seat
Extended stem design for low temperature
Flanged or butt-welding ends

STANDARD MATERIAL SPECIFICATIONS

STRUCTURAL FEATURES

Gasket of Cover Flange
Carbon steel or stainless steel + flexible graphite combined gasket is used for Class150 gate valve; Stainless steel + flexible graphite wounded gasket is used for Class 300 gate valve; Stainless steel + flexible graphite wounded gasket is used for Class600 gate valve and ring joint gasket is also optional for Class600 gate valve;Ring Joint gasket is used for Class 900 gate valve; Pressurized seal design is used for Class1500 ～Class2500 gate valve.

Packing Seal
Molded flexible graphite is used for packing material. PTFE or combined packing material can be also used if being requested by the customer. The internal surface of the stuffing box, of which area is contacted with the packing, is of excellent finish (Ra3.2μm). The stem surface, contacting with the packing, should be rolled and pressed after being precisely machined, so as to reach to the high finish and compactness (Ra0.8μm) and ensure the reliable tightness of the stem area.

Back Seating Design
All our gate valves have the back seating design. In most cases,the carbon steel gate valve is fitted with a renewable back seat. For stainless steel gate valve, the back seat is machined directly in the bonnet or is machined after welding. When the gate valve is at fully open position, the sealing of the back seat can be very reliable.However, as per the requirement of API 600, it is not advisable to add or change packing by the mean of back seating when the valve is Pressure containing.

FAQ
1.Q: What's the brand of your company manufacture ?
A:NSV or OEM service
2. Q:Does "NSV" valves have supply to any value end user?
A:Yes,it just like PETROKIMIA GRESIK in Indonesia, BP Iraq,ESFAHAN MOBARAKEH STEEL In Iran etc.

3. Q:Is there have MOQ?
A：No.we can accept 1set,but there have additional cost $150.00(process of export) if the order value within $2000.00.

We strive to be the preferred supply partner of our customers by providing high quality DIN F4 Carbon Steel Flexible Wedge Gate Valve and value-added services to pursue the greatest customer satisfaction! We've been always creating new technology to streamline the production, and give products with competitive prices and high quality! Since the establishment of our company, with the care and support of colleagues and customers from all walks of life, we have been constantly striving for progress and have developed into a comprehensive enterprise. Welcome new and old customers to negotiate and cooperate with us, let us cooperate for a win-win situation.