Stainless Steel Triple Eccentric Metal Seal Wafer Butterfly Valve

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Product details

NSV Triple Eccentric Lug Butterfly Valve means Stem axis offset from the center of the disc and the center of the body, and the valve seat rotation axis and the valve body channel axis has a certain Angle. It is widely used in metallurgy,electric power, petrochemical, water supply and drainage, municipal construction and other industrial pipelines with medium temperature ≤425℃, for regulating the flow rate and carrying cut-off body.

Applicable Standard
Design Standard: API 609, MSS SP-67, MSS SP-68, BS 5155
Face to Face: API 609, ASME B16.10, BS 5155, EN1092
End Connection: ASME B16.5, ASME B16.47
Inspection and Test: API 598

Products Range
Size: 2" ~ 36" (DN50 ~ DN900)
Rating: ANSI 150lb ~ 600lb
Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel.
Disc Sealing: PTFE, Graphite Laminated
Operation: Lever, Gear, Electric, Pneumatic, Hydraulic

Design Features
Triple eccentric design
Metal to metal,Rubber,PTFE seated
Bi-directional service
Lug Connection

STRUCTURAL FEATURES

1. Multilayer Hard Seal Structure(See fig．right)
Multilayer hard seal structure is applicable. double and triple eccentric butterfly valves, pressure rating≤CLASS600．And triple eccentric butterfly valve can maintain bi-directional Ieak—tightness.Multilayer sealing ring is composite of stainless steel and nonmetal material. The nonmetal material can be flexible graphite。PTFE or non asbestos material etc. according to the actual working conditions.

2. Elastic ring hard seal structure(see fig right)is of the structure of J-type metal sealing ring. It is applicable and double eccentric butterfly valves. pressure rating≤CLASS 300. Provided with fireproof structure to adapt to conditions with great temperature changes, it is featured by outstanding seal, long service life and easy workmanship.

3. When butterfly valve is fully opened, flow resistance is low.
When partially opened, it may carry out sensitive flow control.

IDENTIFICATION OF THE VALVES BEFORE INSTALL ON PIPELINE

1.Each valve has a stainless steel nameplate fixed to the body.the nameplate is marked with details such as valve size,rating,material of construction and series number of the valve,a typical nameplate is shown bellow:

2.Tag number will also be attached to the valve if requested at the time of order.

FAQ

1. Q: What’s the valves warranty?
A: Our valves warranty period should be 18 months from the date of shipment or 12 months after installation, whichever occurs first.

2. Q:What’s the packing for shipping?

A:Its carton for small valves(sample) and plywood case(don’t to fumigate).

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 will strive to become a Stainless Steel Triple Eccentric Metal Seal Wafer Butterfly Valve manufacturer with great comprehensive strength and strong competitiveness to meet the needs of market competition. We sincerely hope to become a strategic partner in your business and grow together with you! Excellent quality and professional service attitude have won wide praise for our company. In the era of speed and change, our company is born for high-quality, and scientific development.