Fabricated Jackets

Reliant Valve fabricates both full and partial weld-on jackets on any number of valve designs . In order to prevent an adverse reaction to the product flow, efficient temperature transfer is crucial in eliminating possible pockets of thermal variation. The heating or cooling medium comes into contact with the exterior of the valve body providing reliable temperature migration. Standard jacketing materials are steel,or stainless steel but other materials can be used. After the fabrication work is done, all jackets are tested underwater with helium @ 325 PSI. When assembled, the process end of the valve is tested to API 598 - ASME 16.34 standards. There are several design considerations when ordering a jacketed valve. The list below can be a help guide in finding the right jacket configuration for your customer.

Jacketing Options

  •  Full or Partial Jacket                   
  • Jacket Material                              
  • End-To-End Dimension                                        
  • Thermal Sensor Access              
  • Jacketing Bonnets: Gates,Globes or Checks
  • Jacket Outlets: Quanity - FE, SE, or SW
  • Extended Outlets For Insulation
  • Gear or Actuator Mounting or Remounting

Standard Designs

Full Jacket / Oversize Flanges

Partial Jacket / Standard Flanges

Full Jacket/ Standard Flanges

A full port 2 Pc ball valve when fully jacketed will be lengthened E-to-E, requiring over-size flanges and two jackets, one on the valve body and one on thetail piece.This design offers full converge without covering the center valve body flanges. Depending on the valve design, the number of outlets on each jacket is either two or three. Full jacketing is possible on most any valve design.​​
Only the center section of a partially jacketed valve is enclosed. The temperature source effects only the middle of the valve, but the ends and flanges are effected indirectly. Most valve designs can be jacketed in this way. When full jacketing is not necessary, partial jackets can be a simple and economical way to keep your customer's products flowing. 
The full jacket /line-size flange design offers full jacket capability on a standard flange valve. The jacket extends from flange end to flange end with blind threaded inserts welded front and back into modified bolt holes in place of the ordinary thru holes. The jacket is welded to the outer diameter of the valve`s flanges and then to the valve body. This type of jacketed valve is installed with threaded studs. 

Fully Jacketed Valve Design

Partially jacketed valves and jacketed line-size valves retain their original length. Fully
jacketed valves require that the valve body be lengthened and the existing flanges are replaced with oversized flanges. The standard is to use flanges one size over the original valves line size. Example: a 3x2x3 fully jacketed 150# plug valve would be a 2" plug with 3" -150# flanges and a face-to-face length of a standard 3" plug which is 8" long. This design is used to accommodate the double-pipe heat exchanger steam tracing system. Temperature control is maintained by one of the process streams containing flowing steam and the other stream is the process media. Due to the large heat transfer area surrounding the process media, the system is considered " temperature predicable". Variations on the end-to-end length of a jacketed valve is possible for special applications or for replacement of a non-standard length valve already in service that is jacketed. For design purposes, all that is needed is to modify the valve body length before reflanging takes place. The quantity, size & configuration ( FE, SW or
SE ) of the steam ports is left up to the customer`s specifications.