Sample and Chemical Injection Valves
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Sample and Chemical Injection Valves

Colson X-Cel can supply a range of primary isolation double block and bleed valves (DBB) meeting the requirements of both instrument and piping engineer’s needs.

The valves offer significant savings in both weight and space as well as reducing installation time and cost. Suitable for isolation of lines, Sampling or chemical injection service the valves can be supplied using ball, Outside Screw and Yoke (OSY), bolted or threaded bonnet needle valves.

Connections can be manufactured that include flanged, threaded, hubbed, compression or welded and are available in single piece or bolted construction.

Sample Valves

The use of a DBB valve with a sample probe replaces conventional multi-valve assembly to take process samples. A sample probe integral to the DBB valve is scarf out to allow process pressure into the valve where a sample can be removed safely without stopping flow.

Chemical Injection Valves

Also using a standard DBB valve design the chemical injection valve allows the safe injection of chemicals into the process line at full pressure.

The probe usually features a 3mm (1/8") hole or spray nozzle allowing the injection to be dispersed into the process evenly. A check valve on the inlet prevents any back flow out of the process stream.

Materials: CS,SS, Monel, Hastalloy, Duplex and High Nickel alloys.
Seat: Metal or soft. Firesafe as standard.
Connections: 1/2” to 8” threaded, welded, flanged or Hubbed.
Bore sizes: 1/4” (6mm) to 8” (200mm)
Pressure (max): Ansi class 2500 - 6,000 psig (414 barg) and API 10K (10,000 psig(690 barg)
Temperature (max): 1000 °F (538 °C)

Products

DFC Series Firesafe Integral Injection DBB Valves
DFC Series Firesafe Integral Injection DBB Valves
  • DFC Series Double Block Bleed Valve
  • Ball/Needle/Ball Flanged DBB
  • Size range 1/4 Inch to 3 Inch
  • Class rating 150 to 2500lb and API 10,000 PSI
  • Material 316ss to Super Alloys
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DMC Series Firesafe Modular Sample and Injection DBB valve.
DMC Series Firesafe Modular Sample and Injection DBB valve.
  • DMC Series Double Block Bleed Valve
  • Ball/Needle/Ball Modular Flanged DBB
  • Size range 1/4 Inch to 8 Inch
  • Class rating 150 to 2500lb and API 10,000psi.
  • Material 316ss to Super Alloys
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DFP Series Firesafe Integral Sample DBB Valves
DFP Series Firesafe Integral Sample DBB Valves
  • DFP Series Double Block Bleed Valve
  • Ball/Needle/Ball Flanged DBB
  • Size range 1/4 Inch to 3 Inch
  • Class rating 150 to 2500lb and API 10,000 PSI
  • Material 316ss to Super Alloys
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