CRANE Cast Steel Gate Valves

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Every Crane cast steel valve is subjected to a 100% pressure test according to API 598 requirements.

Flexible Wedge

  • Compensates for deformation of body due to pipe stresses.
  • Will not stick when valve is closed hot and allowed to cool.

Welded-in Seat Ring

  • Seat ring is seal welded to eliminate leak path.

These valves comply with the applicable requirements of the following standards:

  • API 600
  • API 598
  • ASME B16.34
  • ASME B16.25
  • ASME B16.10
  • ASME B16.5

Every Crane cast steel valve is subjected to a 100% pressure test according to API 598 requirements. Manufacturer’s material test reports and Inspection and Test Certifications are available upon request. Some of the additional inspections and tests performed are:

  • Random Radiograph Inspection of Body and Bonnet Castings to ASME B16.34 Appendix B
  • Random Chemical Composition and Mechanical Properties Verification of Fasteners to ASTM A-193/A-194
  • Liquid Penetrate Inspection of Seat Rings
  • Visual Inspection of Casting to MSS SP-55 and MSS SP-112
  • Receiving, In-Process, and Final Dimensional Inspections to Relevant Valve Standards
  • Standard material is ASTM A216 Grade WCB.
  • Standard trim is XU (13% Cr to hardface) which is suitable for a wide range of applications.
  • Butt weld end dimensions shall be in accordance with ASME B16.25 (without backing ring) for standard pipe schedules, unless otherwise specified in the purchase order. Butt weld ends shall not be produced from flanged end castings unless specifically authorized in writing by CRANE Energy Flow Solutions.

Class – Schedule
150/300 – Standard
600 – Extra Strong
900/1500 – Schedule 160

Body
Body is cast to provide liberal strength to meet operating conditions and to permit unobstructed flow. Turbulence, erosion and pressure drop are minimized.
Flanged End-Crane cast steel gate valves are available in flanged end and butt weld ends. All flanged and butt welding end valves are designed to conform to ASME B16.5 and ASME B16.34 standards.

Integral Yoke & Bonnet
Some designs incorporate a two-piece bonnet and yoke. All bonnet assemblies are cast and finished to the same exacting tolerances as the bodies for accurate alignment of stems and ease of sealing. Bonnet joint varies from flat face gasket-joint to ring-type bonnet joint, depending on class.

Seat Rings
Seat rings are seal welded to eliminate leak path behind rings and for long trouble-free service. The surfaces are precision ground to fit accurately with the disc.

Disc
Crane’s one piece flexible disc provides accurate alignment of mating seating surfaces so the valve can absorb piping strains without leakage. Also, it avoids any tendency to stick in the seated position.

Stem
The tee-head disc-stem connection prevents lateral strain on the stem for smooth, easy operation. Accurately cut threads engage the yoke sleeve for positive control of disc position.

Yoke Sleeve

Handwheel Nut

Yoke Sleeve Retaining Nut

Packing
Packing contains corrosion inhibitor to avoid stem pitting. Stuffing box is deep, assuring long packing life.

Gland
Gland is a two-piece ball-type which exerts even pressure on the packing without binding the stem.

Gland Flange

Gland Eye Bolts
Eyebolts swing aside for ease in repacking the stuffing box.

Gland Eye Bolt Nuts

Bonnet Gasket

Bonnet Studs
Number is dependent on valve size and class.

Bonnet Nuts
Number is dependent on valve size and class.

Gland Eyebolt Pins

Bonnet Bushing

Handwheel
Crane gate valves can also be supplied with gear or motor operators.

Hydraulic Grease Fitting
Hydraulic grease fitting provides for lubrication of yoke sleeve bearing surfaces.