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Henry Pratt High Performance Butterfly Valve Series 400

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Henry Pratt High Performance Butterfly Valve Series 400
Manufacturer: Henry pratt

Our Series 400 high performance butterfly valves have a double eccentricity and can be widely used for automatic proportion control. Simple and clear valve structures enable users to assemble and disassemble easily. Our valves are classified as wafer, lugged and flanged end type by their shape. Their principal parts consist of body, disc, seat and stem. Material of each part is determined by the application and working condition of the valve.

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Features Model Document
  • Body - High quality one piece casting which provides consistent uniformity. Sizes 2 inch to 6 inch are investment castings. Body is available in Wafer, Lug, Double Flanged, and Butt-welded.
  • Underneath Drawn Gland Packing - Allows for direct mounting of actuation and ease of adjustment.
  • Seat - An advanced design that provides a bidirectional interference and pressure assisted seal. This design achieves maximum seal at low, medium and high pressure.
  • Extended Neck - Allows for two inches of pipe insulation. Packing — PTFE is a cup and cone system and Graphite is die formed rings for positive seals.
  • Bearings - Made of Graphite impregnated or Reinforced PTFE impregnated 316 Stainless Steel to ensure long service life.
  • Stem - Manufactured of high strength 17-4 ph Stainless Steel to provide maximum strength and stability for high torque applications.
  • Disc - Made of CF8M Stainless Steel and engineered to allow for quick release from the seat. This reduces the amount of torque needed to un-seat the disc.
  • Disc Taper Pins - Pins are offset from the center of the stem which places them in compression rather than in sheer. This gives them a yield point greater than the stem itself. Pins are welded in place after final assembly and testing.
  • Integrally Cast Disc Position Stop - Machined position stop on the body locates the disc in the seat to achieve maximum seat and seal life.
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