10/03/2017

VALVES Forged Valves | Bellows Sealed Valves

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    1. Body   The body is forged steel and designed to the basic dimensional requirements of the applicable specifications such as API 602 and ASME B16.34. The body is available in both the full or conventional port design.
    2. Bonnet   The bonnet is forged steel, has an integral backseat and incorporates the stuffing box, which has dimensions per the applicable specifications such as API 602.
    3. Bellows   The hydroformed bellows design is in accordance with specifications API 602 and MSS-SP-117.
    4. Bonnet Extension
  The bonnet extension is forged steel and of similar material as the body and bonnet and attached by a welded connection.
    5. Body-Bonnet Joint   Two different bonnet joint desiggns are available. These are either the welded or the bolted bonnet type. The bolted bonnet joint design valve uses a contained, controlled compression, spiral wound type gasket. The bonnet bolting is manufactured of alloy steel in accordance with the requirements of the applicable specifications such as API 602 and ASME B16.34.
    6. Seat Rings   The seat rings are steel and make up part of the valve trim. They are pressed into the valve body and wedged into place, forming a seal with the body. The seating surfaces are ground and lapped.
    7. Wedge   The wedge, which is a solid design, is forged or investment cast steel and is part of the valve trim. The seating surfaces are ground and lapped.
    8. Stem   The stem is forged steel and parte of the valve trim. It contains and integral back seat shoulder, which mates with the integral backseat of the bonnet. The stem is designed to the basic dimensional requirements of the applicable specifications such as API 602.
    9. Gland & Flange   The gland, gland flange assembly utilizes a separate, two piece design. This self aligning design allows thee flange to be unevenly tightened while the gland maintains its parallel alignment with the stem and stuffing box.
 10. Gland Bolts & Nuts   The steel/stainless steel gland bolt and nut assembly is a stud, double nut arrrangement. This design allows complete removal from the valve when service is required. The use of industry standard thread full length studs and nuts also allows easy replacement should these items be lost or in need of replacement.
 11. Yoke Sleeve   The yoke sleeve is of forged stainless steel material having a high melting point and is resistant to wear and corrosion.
 12. Handwheel   The handwheel is of forged carbon steel of an open spoke design. This robust construction along with appropriate sizing allows for ease of operation.
 13. Grease Fitting
  The grease fitting is incorporated in the bonnet for stem and yoke sleeve lubication to ensure smooth operation.
 14. Thrust Washer
  The thrust washer is between the bonnet and yoke sleeve to help prevent excessive wear of the yoke bushing and reduce operating torque.