Hydraulic Ball Valves

Features

• Working pressure up to 20,000 psig (1379 bar)
• Maximum external pressure: 6,000 psig (414 bar)
• Hydraulic supply pressure: 3,000 psig (207 bar)
• Working temperature: 0°F to 200°F (-17.8℃ to 93℃)
• High tensile 316 stainless steel or S17400 stainless steel for valve body and S17400 for hydraulic actuator
• Fluorocarbon FKM O-ring and PEEK seal provide excellent resistance against chemicals, heat and abrasion
• Three types of hydraulic actuators (HTO, HTC, DH) available
• Maximum water depth: 13,800 ft. (4200 m)

Working Principle

2-Way (90° on-off)

HO: Hydraulic to open, single acting with spring return (Normally Closed)

Hydraulic pressure applied to port P1 forces the piston to move towards right and compress the spring, causing a clockwise rotation by 90 degrees. The valve fully opens.

Following loss of hydraulic pressure on port 1, the compressed spring forces the piston to move towards left, causing a counterclockwise rotation by 90 degrees. The valve closes.

HTC: Hydraulic to closed, single acting with spring return (Normally Open)

Hydraulic pressure applied to port P1 forces the piston to move towards right and compress the spring, causing a clockwise rotation by 90 degrees. The valve closes.

Following loss of hydraulic pressure on port P1, the compressed spring forces the piston to move towards left, causing a counterclockwise rotation by 90 degrees. The valve fully opens.

3-Way (180° switching)

DH: 180° Normally Closed, double acting with spring return

Hydraulic pressure applied to port P1 forces the piston to move towards right and compress the spring, causing a clockwise rotation by 90 degrees. The flow is allowed from bottom inlet port P to outlet A.

Following loss of hydraulic pressure on port P1, the compressed spring forces the piston to move towards left, causing a counterclockwise rotation by 90 degrees. The valve closes.

Hydraulic pressure applied to port P2 forces the piston to move towards left and compress the spring, causing a counterclockwise rotation by 90 degrees. The flow is allowed from bottom inlet port P to outlet B.

Ordering Number Description

For more information on Subsea Hydraulic Ball Valves contact our sales team: sales@nvfcl.com or call 01942601209.