DSI 4" 150 RF GATE VALVE 316 BODY 2ZDG FIG# 37-15-16HFS

DSI

4" 150 RF GATE VALVE

316 BODY 316 TRIM

2ZDG FIG# 37-15-16HFS

Part Number & Material Breakdown

• DSI: Manufacturer (DSI Valves).
• 4": Nominal pipe size (4 inches).
• 150: ASME Pressure Class 150 rating (maximum operating pressure up to 275 PSI at ambient temperature).
• RF: Raised Face flanged end connection design.
• GATE VALVE: A manual, multiturn isolation valve featuring an Outside Screw and Yoke (OS&Y) design with a rising stem and bolted bonnet.
• 316 BODY: The primary pressure-retaining casting shell (body and bonnet) is poured from 316 Stainless Steel, designated as standard ASTM A351 CF8M.
• 316 TRIM: The internal wet-end sealing components (the stem, wedge disc, and backseat) are manufactured from 316 Stainless Steel to provide uniform corrosion resistance.
• FIG# 37-15-16HFS: The official catalog configuration number.37: DSI's design indicator for an OS&Y flexible wedge gate valve with a bolted bonnet.
• 15-16: Specific technical code designating the base material class (316 Stainless Steel body, bonnet, and internal wedge matrix).
• HFS: Hard-Faced Seats, specifying that the seat rings are weld-overlayed with a hard cobalt-base alloy (typically Stellite® #6) to drastically increase resistance to galling, abrasion, and high-velocity erosion across the sealing faces.