Check Valves
Crown Swing Check Valves
- simple, dependable design
- full bore for passage of pigs
- butt weld, raised face and RTJ ends
- wide range of options and accessories
Crown Piston Check Valves
- axial flow
- raised face and RTJ ends
- simple, dependable design
- available for vertical flow-up or down service
Crown Wafer Check Valves
- economical
- space-saving design
- suitable for vertical flow-up service
- clapper opens in downstream piping
Crown Wafer Nozzle Check Valves
- non-slam
- axial flow
- low pressure drop
- space-saving design
- available for vertical flow-up or down service
Actuated Check Valves
- lock open levers
- worm gear operators
- handwheel extensions
- pneumatic, hydraulic and electric actuators
Subsea Check Valves
- ROV interfaces
- lock open levers
- worm gear operators
- various gland designs
Crown-Europa Nozzle Check Valves
- non-slam
- axial flow
- low maintenance costs
- provides energy savings due to low pressure drops
- sizes up to 60” available
Crown Pigging Tees
- available in alloy steel for flanged, weld end and threaded end connections for sizes 2”, 3” and 4”
- ductile iron tees in threaded end connections available in sizes 2” and 3”
- working pressure is up to 2000 psi in either right angle or inline designs
- flange connections are stocked in Schedule 40 but are also available in Schedule 80
Accessories
Lever Lock Assembly: The external lever lock clapper assembly enables the user to control the clapper motion with the valve under pressure.
Proximity Switch: The switch utilizes both reaction forces of magnetic power attraction and repulsion in its operating principles. It provides an input signal to a process control of either open or closed indication.
Rovane Slam Retarders: The rovane slam retarders provide a dependable and efficient torque for control clapper slam and flutter.
Counterbalance Arms and Weights: Assists in closing the clapper upon flow reversal and provides a minimum amount of backpressure. It indicates the clapper position. The weight is adjustable back and forth on the arm to increase or decrease effective torque on the check valve clapper shaft.
