Oliver Needle Valves

Tee Bar

316 Stainless Steel for maximum corrosion resistance, fastened to spindle by anti-vibration bolt can be inter-changed with anti-tamper feature or a handwheel with or without our patented locking device.

 

Seal

Precision machined, works in conjunction with a dynamic piston ring, giving leak free operation for the life of the product. Seals in alternative materials are available.

 

PISTON RING

Uniquely offers dynamic adjustment of the packing gland seal in response to pressure change. This feature ensures leak free spindle sealing.

 

INTERCHANGEABLE TIPS

Non-rotating self-centering, anti-galling spindle tip gives positive bubble-tight shut-off self-centering closure and field inter-changeability of different tip styles is possible.

 

TRACEABILITY OF MATERIALS

All Oliver products have material traceability and pressure test certificates to BS EN 10204 3.1 and controlled by QA procedures approved to ISO 9001:2008. A unique code is stamped on all needle valve bodies linking them with their material and chemical analysis certificates.

 

HOUSING

Rugged design with rolled threads in contact with body ensures high factor of safety when needle valve is at maximum pressure and temperature. Metal to metal, body to bonnet contact coupled with a special secondary seal offers an extremely effective leak free joint.

 

DUST CAP

Protects lubricated spindle threads from the ingress of dirt. Caps are colour coded to show the type of service condition the needle valve is suitable for – RED (standard) PTFE packed; WHITE degreased for oxygen service: BLACK Graphite packed.

 

PUSHER AND LOCK NUT

These precision machined parts adjust piston ring compression on the packing to give leak free operation, even on vacuum service.

 

ANTI-BLOWOUT SPINDLE

The heart of our needle valve. All threads are rolled and lubricated to eliminate galling. A special ten micro inch super finish on the seal diameter dramatically reduces operating torque. And the stem is antiblowout/non-removable – a major safety feature.

 

LOCKING PIN

A 316 Stainless Steel pin eliminates unauthorised removal of the bonnet assembly. The pin is held by an anti-vibration spline into the body.

 

IDENTITY RING

A Stainless Steel ring around the housing indicates in colour coded form the status of the needle valve: isolate (blue), vent (red) or equalise (green).

 

Specification

  • PRESSURE: 6,000 PSI
  • TEMPERATURE: 2400
  • PACKING: PTFE
  • THREAD FORM: NPT
  • MANIFOLD CONN SIZE:1/2″
  • HANDLE: ‘T’ BAR
  • SEAT: METAL TO METAL
  • BORE: 0.21″ (5.4mm)
  • CV:0.46

 

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