Keystone Butterfly Valve Figures 129 & 139

Overview

Figure 129 and Figure 139 are heavy-duty, resilient-seated butterfly valves that are ideally suited for many industrial high-performance applications, such as air, water, and vacuum service. In addition, Figures 129 and 139 can also be used for marine and naval use where MIL-V-22133C specified valves are required.

Specifications

Sizes	2-20 inch
Pressure ratings	200 psi
Temperature range	-40 °F to 250 °F
Standards	API 609, ASME B16.34
Body	Cast iron, Ductile iron, Nickel aluminum bronze
Disc	Ductile iron, Aluminum bronze, 316 Stainless Steel, Monel®
Seat	NBR, EPDM

Features

Replaceable, metal-reinforced seat, completely encapsulated by rubber, isolates the stem and body from the media and eliminates seat deformation due to high vacuum or turbulence.
Self-adjusting, bi-directional stem seal is ideal for full industrial vacuum and pressure, preventing external contamination of the stem area.
Heavy-duty, corrosion-resistant top bushing absorbs all actuator side thrust loads.
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, crafted by an engineered interference fit of the stem through the seat, providing additional sealing integrity.
Self-locking, stainless steel disc screws allow for quick deconstruction, while also providing a solid connection.
ABS Type Approved

Additional Information

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