Cast Steel Gate, Globe & Check
For years, DSI Cast Steel Valves have met the needs of petroleum refineries, chemical processing plants, power generating plants, and and other processing facilities worldwide. We design, engineer, and manufacture our Cast Steel valves in strict conformance to API, ASTM, ASME, ANSI and other recognized standards. DSI Cast Steel valves are renowned for their outstanding performance, reliability, and quality, featuring standard attributes often optional in different brands. All flanged DSI Cast Steel valves come standard with 125-250 RA flange finishes. DSI utilizes flexible graphite packing, various gasket materials, and exacting assembly and testing procedures to ensure compliance with the world’s emissions control standards.
Cast Stainless and High Alloy Valves
Gate Valves
- Size Range 2” to 24”
- Pressure Class 150# to 1500#
- API 603 / ASME B16.34 or API 600
- NACE Certification Available
- Low Fugitive Emission Compliant
Globe Valves
- Size Range 2” to 12”
- Pressure Class 150# to 1500#
- ASME B16.34 or BS 1873
- NACE Certification available
- Low Fugitive Emission Compliant
Check Valves
- Size Range 2” to 24”
- Pressure Class 150# to 1500#
- ASME B16.34 or API594
- NACE Certification Available4
Cast Carbon, Chrome and Low Temperature Globe Valves
Gate Valves
- Size Range 2” to 56”
- Pressure Class 150# to 2500#
- API 600 / ASME B16.34
- NACE Certification Available
- Low Fugitive Emission Compliant
Globe Valves
- Size Range 2” to 14”
- Pressure Class 150# to 2500#
- ASME B16.34/BS 1873 (API 600 Design)
- NACE Certification Available
- Low Fugitive Emission Compliant
Check Valves
- Size Range 2” to 36”
- Pressure Class 150# to 2500#
- ASME B16.34 / API 594
- NACE Certification Available
- Low Fugitive Emission Compliant
Bevel Gear Operators
Zy-Gear gear operators are designed for long lasting dependable service in oil & gas and industrial actuation applications. For years project managers and engineers have specified and relied upon Zy-Gear and other quality DSI products for petroleum refining, chemical processing, power generating, pulp and paper, water treatment and other processing facilities located throughout the world.
The Zy-Gear product line offers a worm or bevel gear model for applications where dependable, accurate actuation is required. The Zy-Gear product offering has been computer designed, manufactured and tested to provide smooth, dependable gear operation for many years.
All Zy-Gear gear operators conform to all applicable recognized standards and can be custom designed to meet your project requirements. Specify Zy-Gear gear operators for all your actuation applications and you’ll experience first hand what DSI dependability really means.
Zy-gear bevel gear operators actuate your multi-turn valves. Zy-gear bevel gears are constructed with all the materials, design, technology and engineering you expect to find in a quality gear.
Standard Features
- O-ring sealed and lubricated for life.
- Totally enclosed for buried service, high temperature, low temperature, numerous chemical plant conditions and full weather resistance.
- Comprehensive product line for torque capability.
- Machine-generated gearing assures minimum backlash and smooth operation.
- Sturdy materials, proven design and quality manufacturing ensure trouble-free life.
- Bevel pinion and bevel gear supported by anti-friction ball bearings.
- Stem protector is available in standard NPT pipe sizes
- High strength carbon steel handwheel included
- Standard NPT stem protector thread
Product Groups
- BG107
- BG207
- BG307
Available Literature
Cast Stainless and High Alloy Cryogenic Valves
Applications involving liquefied natural gas (LNG) and other low-temperature fluids demand specialized valve solutions due to the extreme cold conditions. DSI gate, globe, and check valves are engineered explicitly for cryogenic service, ensuring reliable performance in these challenging environments.
These valves are constructed using carefully selected body and trim materials that provide:
- Superior impact strength
- Excellent corrosion resistance
- Effective thermal insulation
A key design feature is the extended bonnet and gas column, which insulates the stem seal and packing area. This design places the stem seal in the vapor zone of the liquid media ensuring safe, continuous operation even at cryogenic temperatures.
A wide range of body, trim, seat, and seal materials is available to meet diverse application needs. Customer-specified options—such as body cavity vent holes, custom extension lengths, and Kel-F components—can be provided upon request.
