The Most Unique Needle Valve on the Market Today

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.

Needle Valve

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).

The Oliver Valves non-rotating plug ensures nonrotating linear plug closure eliminating galling.

Threads protected from process media.

Automatic seal pressure adjuster - ensures effective leak free spindle sealing at low and very high pressures.

Needle Valve

Dirty media washes thru clearance - no chance of tip rotation.

Plug type open/close tips - no rotary motion on closure, no galling.

Self centering nonrotating plug closure tip.

These unique features ensure years of trouble free service even under the most adverse process conditions.

Most of the world’s instrument valves use a "swaged" ball or tip as shown.

"Non-rotating ball" - can seize to spindle due to fine clearances.

Dirty media stays trapped in causing ball/spindle to gall on closure.


Needle Valve

Wear on non-adjustable spindle seals leads to valve leaking in service.

On closure ball develops an indentation, if ball then rotates leakage occurs.

Above problems frequently cause ball to gall with the seat.

Most lower priced valves have these weaknesses. They are not suitable for critical instrumentation applications.

Threads are in contact with process media and thread lubricant is washed away.

Needle Valve

Seal is frequently only an "O" ring.

Rotating spindle gives fast wear on closure.

"Live" spindle wears or galls at the tip, giving leakage.

Needle Valve Specification

(Oliver Valves invites enquiries for special variations on our product lines)

PRESSURE

TEMPERATURE

PACKING

THREAD FORM

MANIFOLD CONN SIZE

HANDLE

SEAT

BORE

CV

6,000 PSI (see graph)

2400 (see graph)

PTFE

NPT

1/2"

'T' BAR

METAL TO METAL

0.21" (5.4mm)

0.46

  • All direct mount manifolds are supplied with Teflon gaskets and high tensile carbon steel bolts, graphite gaskets and stainless steel bolts are available on request.
Needle Valve
  • All needle valves are available to NACE MR-01-75 (Latest revision) for sour service specification (add suffix /NA).
  • Manifolds are not supplied with plugs unless specified.
  • Manifold valves have stainless steel colour coded identity tags affixed to individual valve head units, blue for isolate, green for equalize and red for vent.
  • Products may be degreased for oxygen service to Air Products AO3 standard (add suffix /OXY).
  • Our 6,000 PSI needle valves and our remote mounted manifolds can be uprated to 10,000 PSI (add suffix /HP).
  • Firesafe needle valves and manifolds constructed in austenitic stainless steel and Duplex stainless steel Class 150lb to 2500lb can be supplied. These products have Lloyds Register Approval certificate number 92/00140 (E2) and are to BS 6755 Part 2 (1987) with a maximum working pressure of 6,000 PSI and a maximum working temperature of 5400C (add suffix/FS).
  • Standard needle valves, with PTFE packing, have been tested to full vacuum conditions

Needle Valve