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Keystone™ Commercial Trim Butterfly Valves

In Stock. Affordable. Factory Warranty.

Keystone™ Butterfly Valves have been known for their high quality and exceptional performance for over 60 years. Keystone resilient seated and high-performance butterfly valves are now available for the commercial market backed by this strong reputation for reliability, quality and service. Emerson also offers Keystone pneumatic and electric actuation and control products providing seamless compatibility and a single point of responsibility and contact for your valve package.

K-LOK® Series 36 and 37 High Performance Valve

Features & Benefits
  • ASME 150 & 300 rated with bi-directional drop tight shutoff covering a broad range of services
  • Full rated for bi-directional end of line service allowing for safe isolation of other equipment
  • Blowout-proof shafts come standard, increasing safety of field personnel
  • Double offset disc design, minimizing cycle wear and decreasing total cost of ownership
  • Direct mounting of Keystone actuation on all Keystone butterfly valves, reducing hysteresis and envelope size
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Recommended Specifications

K-LOK Series 36 Drawings

K-LOK Series 37 Drawings

Installation & Maintenance Instructions

Keystone GRW/GRL

Features & Benefits
  • Corrosive-resistant nylon coating on disc trim, enhancing the longevity of the valve and reducing downtime
  • Expansion of the Figure 222 to NPS 24 now covering more applications
    NPS 2-12 has a molded seat and NPS 14-24 has a bonded-in seat for higher pressure holding, creating an easier installation and resulting in lower installation costs
  • NPS 2-12 with full rated 250 psi bi-directional end of line service covering a broad range of services
  • NPS 14-24 with full rated 150 psi bi-directional end of line service covering a broad range of services
  • Direct mounting of Keystone actuation on all Keystone butterfly valves, reducing hysteresis and envelope size
Download Resources

Recommended Specifications

Series 222 Drawings

Installation & Maintenance Instructions

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We Have the Valves You Need, When You Need Them
Proconex has an extensive inventory of control, isolation, and pressure relief/safety valves—all the brands you need. We stock most valves and related devices at one of our three regional warehouses and have access to many more through our Emerson partnership. When it comes to valve automation, we offer the largest portfolio of actuators and controls available in the market today. We have the applications experience and customization capabilities to find the optimum solution for your valve automation needs. In addition, we offer quick delivery and a range of services to keep your plant operating safely and efficiently.