FIG770
FIG 770 ported gate valve is designed to handle severe service applications in a variety
of industries. Basically a full port bi-directional ported gate valve, the design utilizes
twin stainless steel reinforced elastomer seats that are in contact with the gate except
during opening or closing. The elastomer seating surfaces are exposed to the media
only during short duration of the opening or closing operation. This ensures that the
valve can work reliably even in slurry media that
tend to coat (and possibly cement or harden) on
seats.
Another unique feature is the automatic cleaning
of the seating area- this is achieved by a simple,
direct purge fluid connection to the bottom valve
body chamber using the purge ports provided as
standard. Since the flow bore is isolated from the
bottom body chamber except during opening or
closing stroke, purge fluid (typically at about 1 bar
higher pressure than the flow media) will
automatically flow over the seating surfaces and
clean them.
The elastomer seats also double as flange gaskets
and no additional gaskets are necessary to mount the valves in line. Normal gland
packing is provided as a secondary sealing.
Valves are offered in ductile iron, steel or stainless steel body construction with
stainless steel gate; other materials are available as specials. Manual, pneumatic or electric actuation is available.
TYPICAL APPLICATIONS
• Cementing slurries, such as rock phosphate slurry
•Pressure or vacuum pneumatic conveying of abrasive powders
• Vacuum applications
SPECIFICATIONS
TYPE : Through-going soft seated ported gate valve
SIZE RANGE : 50mm to 600mm (higher sizes on application)
PRESSURE RATING : CWP-10 bar standard; others on request
ENDSTYLE : Wafer, flangeless
FACE-TO FACE : As per MSS SP-81 (including the seats that act as flange gaskets as well)
DRILLING : Suitable for flanges drilled to ANSI ANSI 150lb (standard); others on request.
BODY : Ductile iron standard; steel, stainless steel options
SEAT : Replaceable, drop-in stainless steel reinforced elastomer seats; EPDM with 304 stainless steel reinforcement standard (max 120 deg C); Viton and other elastomers on request.
GATE : 304/316 stainless steel is standard; others on request
PACKING : PTFE syntax standard; others on request
STEM : 304 stainless steel standard; others on request
SUPERSTRUCTURE : Steel, epoxy coated standard; others on request
PURGE PORTS : Provided on the bottom body chamber
ACTUATOR OPTIONS : Direct mounted rising stem hand wheel standard; non-rising hand wheel, chain wheel, geared hand wheel, pneumatic cylinder and electric actuator options available
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