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SELF-LOCKING NUT:
The corrosion-resistant locknut with close tolerance threads provides positive, secure assembly of the entire unit and is only used on the Durabla style valves.

RETAINER:
The Durabla style valve uses a drop-on 316 stainless steel type of guard, which speeds assembly and disassembly. The Kentaw valve uses a one-piece stainless steel retainer that will house one or two springs.

STUD OR BOLT:
The Durabla valve uses a "V" taperlock 316 stainless steel stud easily installed and it provides a rigid alignment of sleeve and disc. The Kentaw valve uses a Monel bolt with a Nylon thread locking insert.

SLEEVE:
The Durabla valve has a 316 stainless steel sleeve to protect the stud while providing a polished surface for the disc to contact. The inexpensive sleeve is the main wear portion of the valve and is easily replaced. The sleeve on the Kentaw valve is a one-piece assembly with the retainer.

SPRINGS:
The spring of the Durabla valve can be mounted on the inside or the outside edge of the valve member depending on NPSH and valve style. Either spring is of 316 stainless steel or Inconel upon request. The Kentaw valve comes equipped

with two springs unless otherwise specified. Springs are of Inconel.

VALVE PLATES:
The Durabla valve comes standard with a 316 stainless steel or Delrin plate. The metal valve plate is formed by a special process from stainless steel or appropriate alloy sheet into an arched cross section, making it the lightest weight, lowest inertia yet strongest disc commercially available. The Delrin plate is machined from a high strength engineered plastic suitable for 2500 psi and assures long service life. Point contact with the sleeve minimizes friction and permits instant response to pumping forces. The Kentaw valve comes equipped with either a Delrin or titanium plate. Tight, prompt plate closure maintains unit efficiency.

SEAT:
The seat of both the Durabla and the Kentaw valve is designed to provide optimum flow characteristics through the port area. Available in the correct metallurgy to assure maximum service life in the specified application, the seat face is carefully machined to supply the proper support and seating surface for the valve disc. Where applicable, the outside diameter is machined for press or screw fit to install easily in the pump port specified. Some seats may be supplied rough as cast for machining by the user.