Bolted Bonnet Stainless Steel Solid Wedge Gate Valve

Over the years, the Stainless Steel Knife Gate Valve, Wafer Check Valves, Cast Stainless Steel Globe Valve produced by our company has been favored by users and merchants and become their preferred equipment to replace imports. We take the creation of famous brand as the enterprise development goal and attach great importance to the implementation of quality management. Businesses need to carefully analyze and study the global market, position our products precisely, and constantly stabilize and open the market.

Product Details

NSV Solid 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 solid gate. 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" ~ 20"(DN50 ~ DN500)
Rating: ANSI 150lb ~ 600lb
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
Solid wedge, fully guided
Renewable or welded seat
Extended stem design for low temperature
Flanged or butt-welding ends

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.

◎ Stem Design

The stem is of integral forged design. The minimum diameter of the stem shall per the standard requirement. The connection of the stem and disc is T type. The strength of the connecting area is bigger than that of the T threaded part of the stem. The strength test of that area conforms to API 591.

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: What’s your payment terms?

A: As our company’s policy, we normally have bellow 3 payment terms,it also can negotiation both parties before confirm order.
1) 100% T/T or West Union in advance that order value within $2,000.00USD.

2)30% T/T advance+70% balance after the shipment for the order value above $2,000.00USD.

3)L/C at sight for the order value above $50,000.00USD.

After years of development, our company's business has spread all over the world, becoming one of the Bolted Bonnet Stainless Steel Solid Wedge Gate Valve suppliers with excellent prices, sufficient supply and large inventory. We always insist that win-win is the basis of cooperation, and advocate a perfect and efficient communication and cooperation mechanism. Facing the future, we are full of confidence to forge ahead and create more sophisticated products. We respect the enterprise spirit of 'pragmatic, hard work, and responsibility', and create a good corporate environment with integrity, win-win, and innovative business philosophy.