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Marine Butterfly Valves

Center-line and duo-eccentric butterfly valves with manual, pneumatic and hydraulic variants.

GB/T
Center-Line Butterfly
(5)

Compact flow control for general marine service. Confirm seat material, actuation, size and pressure rating by application.

Marine Center-Pivoted Handle Manual Butterfly Valve (GB/T3036-94A)

Marine Center-Pivoted Handle Manual Butterfly Valve (GB/T3036-94A)

GB/T 3036-94A
DN50-150 1.0 MPa
Marine Center-Pivoted Screw Manual Butterfly Valve (GB/T3036-94B)

Marine Center-Pivoted Screw Manual Butterfly Valve (GB/T3036-94B)

GB/T 3036-94B
DN50-500 1.0 MPa
Marine Center-Pivoted Worm Manual Butterfly Valve (GB/T3036-94C)

Marine Center-Pivoted Worm Manual Butterfly Valve (GB/T3036-94C)

GB/T 3036-94C
DN50-125 1.0 MPa
Marine Center-Pivoted Flanged Worm Manual Butterfly Valve (GB/T3036-94Fc)

Marine Center-Pivoted Flanged Worm Manual Butterfly Valve (GB/T3036-94Fc)

GB/T 3036-94Fc
DN100-250 1.0 MPa
Marine Center-Pivoted Pneumatic Butterfly Valve (GB/T3036-94Q)

Marine Center-Pivoted Pneumatic Butterfly Valve (GB/T3036-94Q)

GB/T 3036-94Q
DN50-400 1.0 MPa
Duo-Eccentric Butterfly
(6)

Duo-eccentric designs for improved seating performance and service life. Confirm seat material, media temperature and actuation requirements.

Marine Duo-Eccentric-Pivoted Worm Manual Butterfly Valve (GB/T3037-94C)

Marine Duo-Eccentric-Pivoted Worm Manual Butterfly Valve (GB/T3037-94C)

GB/T 3037-94C
DN80-700 1.0 MPa
Marine Duo-Eccentric-Pivoted Flanged Worm Manual Butterfly Valve (GB/T3037-94Fc)

Marine Duo-Eccentric-Pivoted Flanged Worm Manual Butterfly Valve (GB/T3037-94Fc)

GB/T 3037-94Fc
DN80-700 1.0 MPa
Marine Duo-Eccentric-Pivoted Pneumatic Butterfly Valve (GB/T3037-94Q)

Marine Duo-Eccentric-Pivoted Pneumatic Butterfly Valve (GB/T3037-94Q)

GB/T 3037-94Q
DN80-650 1.0 MPa
Marine Duo-Eccentric-Pivoted Flanged Pneumatic Butterfly Valve (GB/T3037-94Fq)

Marine Duo-Eccentric-Pivoted Flanged Pneumatic Butterfly Valve (GB/T3037-94Fq)

GB/T 3037-94Fq
DN80-650 1.0 MPa
Marine Duo-Eccentric-Pivoted Simplex Wafer Hydraulic Butterfly Valve (GB/T3037-94Y)

Marine Duo-Eccentric-Pivoted Simplex Wafer Hydraulic Butterfly Valve (GB/T3037-94Y)

GB/T 3037-94Y
DN100-650 1.0 MPa
Marine Duo-Eccentric-Pivoted Simplex Flanged Hydraulic Butterfly Valve (GB/T3037-94Fy)

Marine Duo-Eccentric-Pivoted Simplex Flanged Hydraulic Butterfly Valve (GB/T3037-94Fy)

GB/T 3037-94Fy
DN100-450 1.0 MPa
Procurement Answer

Marine butterfly valve sourcing

This category covers center-line and duo-eccentric butterfly valves with manual, pneumatic and hydraulic variants. Seat material, bore, disc material, actuator duty and flange compatibility are confirmed before quotation.

Before RFQ, confirm standard scope, pressure ratings, flange dimensions, and certificate requirements.

  • GB/T
  • Center-line
  • Duo-eccentric
  • Manual
  • Pneumatic
  • Hydraulic
Submit RFQ

Marine butterfly valve sourcing FAQ

How do GB/T 3036-94 variants differ?

In the current catalog, A is a handle-operated DN50-150 valve, B is screw-operated DN50-500, C is worm-operated DN50-125, Fc is flanged worm-operated DN100-250, and Q is pneumatic DN50-400; all are listed at 1.0 MPa. Seat and disc materials, connection details, actuator scope, tests and documents are still confirmed by RFQ.

What should be confirmed for a JIS F7480 butterfly-valve RFQ?

Send the exact JIS F7480 reference, size and pressure class, body, disc and seat materials, wafer or flange details, actuator requirements, test standard, quantity, required date and certificate scope. GB/T 3036 or another butterfly valve is not treated as an automatic substitution option.

How are center-line and duo-eccentric butterfly valves selected?

Center-line designs are common for general service, while duo-eccentric designs may be used where seating performance, pressure class or service conditions require them. Selection follows standard, medium, temperature, cycle duty and certificate scope.

What should an actuated butterfly valve RFQ include?

Include the valve standard and size, pressure rating, body, disc and seat materials, actuator type, control signal, fail-safe action, flow condition, torque basis, certificate requirement, quantity and delivery schedule.

Can PN and JIS K butterfly valves be directly substituted?

No. The pressure-temperature basis, size, materials, seat temperature limit, flange dimensions, test standard and certificate scope must be checked; the numbers alone are not enough.

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