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Pneumatic Operated Butterfly Valve Dual Offset Spring Return

China TEKO Industry Co., Limited certification
China TEKO Industry Co., Limited certification
Dear Peter, Highly appreciate your sound service. The valves have well arrived and looks every well. Regards, Andrea

—— Mr. Andrea Arredondo

Hi, my friend. Finally we got the bidder and nice to cooperate with you.You prefession and quick reaction was the firm support for the business.

—— Mr.Hiep Le Hao



Good da, we just got the appoval from our customer. Your experiences helped a lot in the project. The final drawing is also very professional. Cheers!

—— Mr. Scott Hornick

compramos de TEKO desde 2011, continuaremos la cooperación. La calidad es buena y el precio es bueno.

—— Ing. Hugo Diaz

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Pneumatic Operated Butterfly Valve Dual Offset Spring Return


Large Image :  Pneumatic Operated Butterfly Valve Dual Offset Spring Return

Product Details:
Place of Origin: Made in China
Brand Name: TEKO
Certification: CE, PED, API
Model Number: D673H
Payment & Shipping Terms:
Minimum Order Quantity: 1 pieces
Price: By negotiation
Packaging Details: Pollywooden cases
Delivery Time: 40 days after deposit
Payment Terms: L/C, T/T, Western Union, MoneyGram
Supply Ability: 500 tons per year
Detailed Product Description
Operation: Double Acting Pneuamtic, Spring Return Pneumatic Body Configuration: Wafer, Lug, Double Flange
Size Rating: 2" To 60" Seat Material: Laminated Disc Seal
Body Seat: CoCr Alloy Deposited Applications: Industrial
High Light:

Pneumatic Operated Butterfly Valve


Dual Offset Spring Butterfly Valve


60" Eccentric Butterfly Valve

Duel Offset Design Spring Return Pneumatic Operated Butterfly Valve



Sizes: 3" through 48" (80 through 1200 mm)
Ratings: ASME CL150 – CL600
Connections: Wafer, Lugged, Raised Face Flanged, RTJ Optional, EN Flange
Body Face to Face: Wafer and lugged bodies API 609 Table-3 (A) (Category B Valves up to 24”)
Double flanged short pattern: API609 table 3 (C) (Category B Valves up to 24”)
Body Materials:

Carbon steel WCC, Stainless steel CF8M, Low Temperature Carbon Steel LCC, Others on request

Trim: Triple Offset

Seat Leakage:

Class IV (Standard) per IEC 60534-4 &ANSI/FCI 70-2

Class V & VI (Optional) per IEC 60534-4 &ANSI/FCI 70-2

Zero Leakage (API 598)

Inherent Characteristics:
Equal percentage
Actuator: Spring-Diaphragm, Scotch Yoke Piston, Manual Gear, Others on request

What is Triple offset design


1st eccentricity

The shaft is diverged from centerline of sealing surface.


2nd eccentricity:

The shaft is diverged from centerline of the pipeline and valve. These two eccentricities are designed for friction reduction between the valve seat and seal ring when opening and closing the valve.


3rd eccentricity

It makes the valve set completely separated from the seal ring through the geometric shape, during the whole process of opening and closing the valve. The special eccentric combination not only makes use of the cam effect, but also completely eliminates friction. It enables no friction between the valve seat and seal ring on the valve plate, to eliminate possible abrasion and leakage, in the 90°stroke of the valve.

Pneumatic Operated Butterfly Valve Dual Offset Spring Return 0

Design Feature

  1. Medium can flow through the body directly for little resistance and high flow capacity.
  2. The body and upper cover could be made of carbon steel,austenitic stainless steel or special alloy material.
  3. The sulfur-free flexible v-graphite is heat resisting,we shall ensure the service life of packing is long-term without maintenance by increasing pre-pressure on spring gasket.
  4. The self-sealing packing structure is tested 100,000 times (full travel) to ensure zero leakage and constant friction.When the stem moves at low friction state,we can get the long-term steady precision of control valve .
  5. The seat adopts multi-level structure, the sealing surface is composed of metal and special non-metal materials to ensure zero leakage.
  6. The shaft center deviates from the valve center bi-directionally. The asymmetric design sealing surface allows the disc to revolve in 0-90° freely.
  7. Triple offset with metal seat design.


High performance applications such as steam, chilled water, gasoline, oil, jet fuels, natural gas, utility lines, process lines and in industries such as:

• Power Generation

• Oil and Gas

• Refineries

• Chemical and Petrochemical

• Steel and Mining

• Pulp and Paper

• Food and Beverage


Contact Details
TEKO Industry Co., Limited

Contact Person: sales

Tel: +8613660157288

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