Keystone Figure 129/139 Butterfly Valve with Powered Actuator
Keystone Figure 129/139 Butterfly Valve with Powered Actuator
Product Description
The Keystone Figure 129/139 is a heavy duty resilient seated butterfly valve featuring a steel reinforced cartridge design seat complete with powered actuator, configurable by power source, size, function and more.
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Replaceable, metal-reinforced seat, completely encapsulated by rubber, isolates the stem and body from the media and eliminates seat distortion due to high vacuum or turbulence.
Primary stem seal, formed by preloaded contact of disc hub with flatted seat surfaces, completely isolates stem and body from the line media.
Secondary stem seal, formed by an engineered interference fit of the stem through the seat, provides additional sealing integrity.
Rounded, polished disc edge provides full 360 degree concentric seating, minimum flow restriction, lower seating and unseating torques and maximum seat life.
Superior, one-piece thru-shaft design provides high-strength and positive disc control. Shaft ends are standardized for operator interchangeability.
Self-locking disc screws allow quick and easy disassembly and provide a positive connection.
Self-adjusting, bi-directional stem seal is suitable for full industrial vacuum and pressure, preventing external contamination of the stem area.
Heavy-duty, corrosion-resistant top bushing absorbs actuator side thrust loads.
Each valve is factory tested to 110 percent of specified pressure rating assures drop-tight shut-off.
Cast-in top plate is an integral part of the body and is standardized to allow direct mounting of all Keystone actuators.
Emerson Powered Actuator
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.
Keystone F89 Pneumatic Quarter-Turn Actuator
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.