Keystone Series GR Butterfly Valve with Powered Actuator

The Keystone Series GR Butterfly Valve with Powered Actuator, designed by Emerson, is a robust, high-performance resilient-seated valve engineered for reliable flow control in a wide range of industrial applications. Built for durability and efficiency, the Series GR combines lightweight construction, tight shutoff performance, and automated actuation for smooth and precise operation. The Series GR Butterfly Valve features a high-strength glass-reinforced nylon body and a stainless-steel shaft, ensuring exceptional corrosion resistance and long-term service life in harsh operating environments. When paired with a powered actuator—either pneumatic or electric—the valve provides accurate on/off and throttling control, making it ideal for process automation systems. This versatile valve is designed to handle air, water, oil, and other compatible fluids, serving a wide variety of industries including HVAC, water treatment, food and beverage, chemical processing, and general industry.

Technical Specification of Keystone Series GR Butterfly Valve with Powered Actuator

Sizes:

DN 50 – 900 (NPS 2 – 36)

Pressure:

16 bar DN 50 – 300 (230 psi NPS 2 – 12)
10 bar DN 350 – 900 (150 psi NPS 14 – 36)

Reinforced seat:

16 bar DN 350 – 600 (230 psi NPS 14 – 24)

End of line:

10 bar DN 50 – 300 (150 psi NPS 2 – 12)
6 bar DN 350 – 900 (90 psi NPS 14 – 36)

Reinforced seat:

10 bar DN 350 – 600 (150 psi NPS 14 – 24)

Vacuum service:

0.4 bar (5.8 psia)

Temperature:

`-40°C to +160°C (-40 °F to +320°F)

Flange accommodation:

PN 6/10/16, 125/150, JIS 10K, BS Table E, AS4087 PN 16, AS2129 Table E

Supply pressure

Up to 8.3 bar

Temperature

`-40°C to 150°C

Type

Quarter-Turn

Feature of Keystone Series GR Butterfly Valve with Powered Actuator

• Wafer and lugged body design with face-to-face dimension, according to EN 558 Series 20 and API 609.
• Designed according to EN 593 and API 609.
• The seat is field replaceable and fully isolates the body and shaft from the flow.
• Primary shaft sealing exceeds the pressure rating of the valve and prevents leakage through shaft area to atmosphere.
• A secondary shaft sealing provides back-up safety.
• A molded-in O-ring in the seat for flange sealing eliminates the need for gaskets.
• Shaft seals prevent moisture penetrating into the shaft area.
• The two piece shaft allows for a thin disc and provides minimal obstruction to flow (up to DN 300/ NPS 12).
• Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and drop-tight shut-off.
• Body locating holes allow ease of installation and centering between the flanges.
• Extended body neck allows for pipe insulation.
• Top and bottom shaft bearings for optimized support and minimum friction and decreased torque.

• Direct mounting to all Keystone butterfly valves and ball valves.
• Valve connection compatible with Keystone (imperial and metric) and ISO 5211.
• Double Rack and Pinion design nullifies side loads on the pinion shaft, minimizing bearing wear and extending life.
• Optimized product flow with standard mounted travel stops for valve position adjustment in open and close position (+/- 5° at each end).
• Anodized aluminium body with electrostatic powder coating (ESPC) finish provides durable protection against corrosive environments.
• Double acting and spring return versions available for cost effective and safe operation.
• Up to 12 individual springs offer flexible torque range for both ball as butterfly valves.
• Pre-compressed spring design and anti-blowout drive pinion means safe maintenance and operation.

• Direct mounting to all Keystone butterfly valves and ball valves.
• Valve connection compatible with Keystone (imperial and metric) and ISO 5211
• Double Rack and Pinion design nullifies side loads on the pinion shaft, minimizing bearing wear and extending life.
• Optimized product flow with standard mounted travel stops for valve position adjustment in open and close position (+/- 5 at each end).
• Anodized aluminum body with electrostatic powder coating (ESPC) finish provides durable protection against corrosive environments.
• Double acting and spring return versions available for cost effective and safe operation.
• Up to 12 individual springs offer flexible torque range for both ball as butterfly valves.
• Pre-compressed spring design and anti-blowout drive pinion means safe maintenance and operation.