Three and Four Web Valves and Seats
Three and Four Web Valves and Seats
The center- guided design of the three web enables the valve flange to be supported under pressure loads by the top of the center support webs in addition to the seating taper on the inside of the valve seat. This process allows for a large bearing area for the valve that minimizes stress and promotes a long service life.
The single-piece, solid-body construction of these valves 3 web design, provides the strength and rigidity needed for high-pressure drilling operations. Both the valve and seat are manufactured from heat- treated, forged-alloy steel.
The unique design of the insert helps seal fluid above the valve, even when the pump is not in operation and pressure is not available to energize the seal. This design helps to maintain prime and ensures that a good supply of mud is available to the piston—even on the first stroke of operation after extended shutdown periods. Special lips in the insert groove of the valve body lock the lip in place, eliminate washout potential, and minimize any chance for loss-circulation or other foreign materials to breach the seal cavity.
The snap-on, urethane insert can be replaced in the field. The valve is offered standard with a urethane insert suitable for mud service between 170° and 180°F
A high-temperature urethane insert is available as an option for mud temperatures to 200°F and higher.
ESPECIFICACIONES TECNICAS
• The forged, solid-body construction provides durability at high pressures.
• The large bearing area on the valve seat webs promotes a long service life.
• Various insert styles and materials are available to suit any drilling condition.
• Carbon-steel valve springs are standard.
• A long-life, stainless-steel upgrade is available.
• The valve is best suited for low- to medium-pressure.
• Drilling operations because of the two-piece assembly of the valve body.