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KEYSTONE Butterfly Valve- A&S Actuator.,Ltd

KEYSTONE Butterfly Valve

KEYSTONE Butterfly Valve

Features and Benefits • Triple function resilient seat helps provide bi-directional drop-tight shut-off, designed to totally isolate the valve body and stem from the line media. • Molded-in O-ring seat design serves as flange seals, eliminating the need for gaskets between the flanges and the valve. • Unique dovetail seat retention design allows for convenient and economical field replacement. • Superior one-piece through shaft design provides high strength and positive disc control. • Internal shaft seal is designed to prevent external media from entering valve and it also adjusts for pressure and shaft rotation. • Heavy-duty, corrosion resistant top bushing delivers upper stem support, absorbs actuator side-loading and extends valve cycle life. • Polished disc edge helps ensure optimal performance and maximum seat life. • Stainless steel torque plug (2" to 12"), disc screws (14" to 20") and taper pins (24" to 36") provide positive leakproof connections while allowing for quick and easy disassembly. • One-piece body with extended neck allows clearance for flanges and insulation. • Each valve is factory-tested to 110 percent of the manufacturer’s pressure rating.

High Performance

High Performance


Keystone High Performance Butterfly Valves deliver dependable control in a wide range of sizes. With
Resilient Seated

Resilient Seated


Keystone Resilient Seated Butterfly Valves are ideal for heavy duty applications such as fire protec
KEYSTONE NeoSeal Lined Butterfly Valve NSD900N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD900N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD800N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD800N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD750N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD750N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD700N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD700N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD600N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD600N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD500N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD500N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD450N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD450N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD400N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD400N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD350N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD350N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo
KEYSTONE NeoSeal Lined Butterfly Valve NSD300N1SFA1B00

KEYSTONE NeoSeal Lined Butterfly Valve NSD300N1SFA1B00


Performance Data Pressure(bar) Liner DN40-150 DN200-600 DN700/800-900 DN750 10 PTFE/TFM -40+180℃ -40+160℃ 10 Butyl -30+120℃ -30+120℃ 10 Carbo

Contact Us

  • A&S Actuator Co., Ltd.
  • 469 Xinsheng Road, Gaoxin District, Chengdu, Sichuan, China
  • Tel: +86-28-67638639
  • Fax: +86-28-86129221
  • Email: actuator@attachment8.com
  • Contact Person: Leo Zhang

Online Ordering

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About Us

A&S Actuator Co., Ltd. is specialized in supplying a wide range of actuators, butterfly valves and cylinders.

Actuators Types:
electric actuators, pneumatic actuators, hydraulic actuators, rotary actuators, linear actuators, magnetic linear actuator, solar actuator, valve actuators, high speed actuators, low pressure actuators, heavy duty linear actuators, piston actuators.


Actuators Brands:
Ouma, Rotork, Honeywell, Kinetrol, Keystone, Parker, SMC, Air Torque, ARI, Azbil, Yamatake, Mitsubishi, OTK, OMAL, etc.

Butterfly Valves:
Danfoss, SMC, OMAL, Siemens, Yamatke, KITZ, etc.

Pneumatic Cylinders / Air Cylinders:
Bosch Rexroth, Parker, DELIXI, SMC, Festo, CKD, Camozzi, Koganei, AirTac, TPM, JMC, TPC, NORGERN, CHELIC, SNS, etc.

Our products have been exported to many regions, such as Europe, America, South Africa, South Asia and the Middle East countries, etc. We have earned a reputation for high-quality products and personalized customer service.

We would like any cooperation. Welcome to contact us for further information.

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