MAC Sleeved Plug Valve RPTFE Flanged Class 150-300 API 599

Introduction

Engineered for high-performance isolation in severe and corrosive environments, our API 599 plug valves are built to deliver positive, bubble-tight shutoff across demanding process pipelines. Available in rugged WCB carbon steel for robust industrial service and premium Stainless Steel (CF8/CF8M) for superior chemical and corrosion resistance, these valves are designed to meet strict Class 150 and Class 300 pressure ratings. Featuring high-durability Reinforced PTFE (RPTFE) sleeves, they provide a continuous, low-friction seal that completely eliminates cavity accumulation while protecting the seating surfaces from abrasive wear. Whether handling aggressive chemicals, gases, or slurries, our MAC API 599 sleeved plug valves ensure minimal maintenance and maximum operational uptime.

Technical Design Features

Type:	Self-Lubricated 2-Way Sleeved Plug Valve
Pressure Class:	Class 150 / Class 300 / Class 600
Port Size:	15mm to 200mm
Material:	ASTM A351 Gr. CF8M Cast Stainless Steel (AISI 316) ASTM 234 Gr. WCB Cast Carbon Steel
Trim Material:	Plug: ASTM A351 Gr. CF8M Cast Stainless Steel (AISI 316) Stem Seal: PTFE or Graphite Sleeve: PTFE or Reinforved PTFE
Connection Type:	Raised Flange to ASME B16.5
Mounting:	ISO 5211 Mount Pad
Operation Method:	Hand Lever or Gearbox (For larger sizes) Electric or Pneumatic Actuation (Via ISO Pad)
Design Standards:	Compliance: ASME B16.34 / BS 5353 Face to Face: ASME B16.10 Designed to API 599 Face-To-Face to ASME B16.10
Testing and Acceptance:	API 598
Design Features:

Main Advantages

Zero Cavity Clogging:	The full-contact sleeve eliminates internal pockets, preventing media from trapping, stagnating, or solidifying.
Continuous Wiping Action:	The tapered plug sweeps across the sleeve during cycling, instantly scraping away scale, grit, and solids.
Bubble-Tight Sealing:	The wide-area contact between the metal plug and the reinforced PTFE sleeve ensures a positive, zero-leakage seal.
No Lubrication Required:	The low-friction sleeve provides inherent lubricity, eliminating the need for sealant grease and preventing line contamination.
Erosion-Resistant Sleeve:	Sealing surfaces are completely turned out of the high-velocity fluid path when the valve is fully open.
High Thermal Stability:	Utilizing reinforced PTFE sleeves allows the valve to maintain tight sealing under fluctuating Class 150 and 300 temperatures.
Inline Adjustability:	External adjustment bolts allow the plug to be re-seated slightly downward to instantly stop minor passing without replacing the sleeve.

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