Rotork Electric Double-Eccentric Butterfly Valve

NSV Rotork Electric Double-Eccentric Butterfly Valve

This is an NSV electric butterfly valve equipped with a Rotork smart electric actuator, enabling remote automatic control with position feedback, fault alarm, and 4-20mA output for seamless integration into DCS/PLC systems. 

The valve features a double-eccentric high-performance design—the stem axis is offset from both the disc center and pipe center—allowing immediate disengagement of the sealing surfaces during operation, significantly reducing friction and wear. Sealing options include reinforced soft seats (PTFE/EPDM) or semi-metallic seals. Available in wafer or flanged end connections, the valve is widely used in power, petrochemical, metallurgy, water treatment, and HVAC industries.

Key Features

Valve type: Double-eccentric high-performance butterfly valve

Actuation: Rotork electric actuator (smart)

Sealing: High-performance soft seal or semi-metallic seal

End connection: Wafer or flanged (RF/FF)

Disc material: 304/316 stainless steel with hardened or coated surface

Actuator functions: Position feedback, limit switches, manual/auto switch

Control signals: 4-20mA / Modbus RTU / HART

Operating temperature: -20°C to 200°C (soft seal); ≤300°C (semi-metallic)

Performance Advantages

Double-eccentric design eliminates seating friction, greatly extending seal life; high-performance seals ensure reliable shut-off under medium-to-high pressure; low operating torque allows efficient, compact actuators for energy savings; Rotork actuator delivers reliability, intelligent diagnostics, and remote monitoring; large sizes suit main process lines; compact and lighter than gate or ball valves, reducing space and support costs.

Typical Applications

Power plant main steam and cooling water systems, petrochemical medium-pressure process lines, metallurgical gas networks, municipal large-diameter water supply, seawater desalination intake, HVAC main duct regulation, fire protection large-flow isolation.

Quality Assurance

Shell and seat tested per API 598 / ISO 5208. EN 10204 3.1 Material Test Certificate provided. Cast body meets ASTM A351 CF8M or equivalent. Actuator certified to CE and ATEX standards with NAMUR mounting interface.

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:How can I get a quote?

2. A: If you request quote by preparing the product spec you want to request specifically through “Contact us or Feedback” of homepage, we will send reply to you ASAP. If the contents of homepage are not available, you can inquire to us via phone(86-577-67378616) or fax(86-577-67372367).

3. Q:Does your company have any agent/distributor with the exception of China?

A: At present,we have agent in Indonesia,Singapore,Canada,Mexico,Iraq,and welcome contact us if you would like to join us.

4. 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.