Sure-grip Handwheel. Fluted design assures a firm grip, even with greasy gloves.

Yoke Nut. Extra long thread engagement between yoke nut and stem provides long thread life. Force feed lubricant application is included.

Gland Eye Bolts Facilitate Packing Maintenance. For ease in repacking the valve, gland eye bolts are mounted to swing aside.

Extra Clearances Prevent Stem Scoring. Sufficient clearance between the gland, stem and stuffing box prevents scoring stem even if the gland is inserted unevenly.

Deep Stuffing Boxes. Depth is more than adequate in all sizes and pressures to assure tightness and maximum packing life. Packing sizes conform to API requirements for refinery service. In all cases bonnet back seats are furnished against which the stem head may be seated, thus relieving the pressure on the packing to facilitate repacking. Stuffing box packing is a reinforced, flexible graphite packing which remains flexible and resilient at high temperature, which permits ease in gland adjustment, and which contains a corrosion inhibitor for protection of the stem.

Walworth Globe Valves Product Catalog

Walworth Cast Steel Globe and Angle Valves have the same sturdy characteristics as Walworth Gate Valves, such as sure-grip handwheels, long threaded yokenuts, deep stuffing boxes, extra strong and tight bonnet joints, excellent guiding of discs above the seat for minimum restriction of flow, extra smooth seating surfaces for ease of tight seating, best selection of trim materials for varied services, etc.

Walworth Cast Steel Globe and Angle Valves can be supplied with V-port, parabolic, or semi-parabolic discs for special flow characteristics.

Where globe and angle valves in Class 300 and higher are regularly furnished with spur or bevel gearing, it will be of the enclosed type mounted, unless otherwise specified, with the handwheel shaft on the left side of the valve when facing the end port that leads from above the disc seat. When specified, these valves can be furnished without gearing.

Walworth Check Valves Product Catalog

Walworth Cast Steel Swing Check Valves have straight-through flow paths and readily opening discs to provide very low friction loss.

POINTS TO REMEMBER ABOUT CHECK VALVES

The function of check valves is to stop reversal of flow automatically and promptly. Usually it is desirable that they be supplemented by gate, globe, or other valves for manual control of the fluid in the line.

Check valves must be sized to meet the flow conditions. Oversizing of a check valve will result in increased wear and improper operation.

Check valves should be installed so that the force of gravity will assist in closing and holding the disc or clapper on the seats.

Check valves are one-way valves and should be installed so that the line pressure is under the disc.

Swing check valves should not be used in vertical pipe lines handling liquids at high heads because severe water hammer may result from reversal of flow.