Fisher DST-G trims are designed for clean or dirty applications where dissolved gases are released from solution when pressure drops (outgassing). Outgassing typically causes two types of damage: cavitation and erosion of the fluid stream. The DST-G trim has a graded pressure drop, similar to the DST trim, to prevent cavitation. Erosion is controlled by the lower cage in the trim, which splits the flowing vapor into smaller, lower energy sprays, reducing the potential for damage. This trim can pass particles up to 6.35mm (1/4in) in diameter.
specification
Critical use for outgassing, dirty conditions
Materials: carbon steel, stainless steel, alloy
Operating temperature: standard temperature
Stress Rating ASME
Process connector type: flanged type
Cut-off class V (FCI 70-2)
Valve sizes NPS 2, NPS 3, NPS 4, NPS 6, NPS 8, NPS 10, NPS 2x3, NPS 3x4, NPS 6x8
Valve size standard NPS
peculiarity
Designed to control outgassing.
Pressure drop limit 175 bar (2500 psi).
The protective seat design separates the cut-off function from the throttling function and protects the seat surface from throttling water.
The hardened trim material provides excellent wear resistance, resulting in longer trim life.
Cage trims can be removed to inspect individual components without removing the body from the pipe.
The cage utilizes large slots to divide the flow into smaller sprays, making it less susceptible to erosion and vibration.
This article introduces the Fisher/Fisher DST-G trim products, if you are interested in Fisher/Fisher pressure regulators, please also contact our customer service, we look forward to your call, hope our technology and service can bring you a better experience.
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