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Miniature Instrumentation Needle Valves

Oliver Valves Limited miniature needle valve range has been designed and developed to provide a compact solution to the traditional assemblies used for the isolation and venting of fluids within instrumentation panels.

The miniature needle valve utilises the well proven swaged non-rotating tip, used in so many Oliver needle valves. The swaged or rolled-in tip offers the user a number of benefits to the traditional solid 'live' spindle or swaged ball type assemblies.

Our miniature needle valves incorporate a dynamic spindle to bonnet sealing arrangement, which means the gland seal does not require adjustment. The seal is located in the bonnet or seal housing before the operating threads. This combined with the metal to metal bonnet to body seal means that all the head unit threads are protected from exposure to process fluid.

The dynamic seal utilises an elastomeric o-ring with a glass filled PTFE Anti-extrusion ring. As standard the o-ring material is an FKM Fluoroelastomer, a typical trade name for this type of material is Viton. The o-ring hardness is Shore 90, this provides maximum resistance to explosive decompression when used on gas service.

Miniature Needle Valve

Key Features of our Miniature Needle Valves:

  • Design Pressure: 10,000psi (690bar)
  • Design Temperature: -20F (-29C) to +350F (+180C)
  • Metal to metal body to bonnet seal.
  • FKM (Viton) Elastomer gland seal with glass filled PTFE Anti-extrusion ring - Maintenance Free (other o-ring seal materials are available)
  • Low Operating Torque
  • Non Rotating Anti-Galling Tip Design
  • Anti-Blowout Spindle with back seat.
  • Manufactured from NACE MR-01-75 / ISO 15156 compliant material.
  • Material traceability code stamped on each valve.
  • Single Block, Block and Bleed and DBB arrangements available.

Tee Bar, Head Unit and Steel Lock Pins

The tee bar is manufactured as standard from 316 stainless steel for maximum corrosion resistance, fastened to the spindle by a 316 stainless steel grub screw. The grub screw engages on a machined flat on the spindle to prevent rounding of the end of the grub screw.

Each head unit is fitted with a dust cap. These caps protect the operating threads from the ingress of dirt. Caps are provided in either Blue or Red, which can also be used to identify the valve function, Blue for block valve and Red for bleed or vent valve.

To prevent unauthorised removal of head units, a 316 stainless steel lock pin is fitted adjacent to each bonnet. The pin is held by an anti-vibration spline into the valve body.

All the Oliver needle valves have a flow pattern where the fluid comes under the tip. This keeps opening torques under differential pressure to a minimum. In addition it minimises the stress on the swaged tip section of the spindle. This is also the case for multiple needle valve manifolds such as the double block and bleed assembly.

Our miniature needle valve range is manufactured in UNS S31600/S31603 austenitic stainless steel as standard. The stainless steel used for each of the wetted components conforms to the requirements of NACE MR0175/ISO 15156. A unique code is stamped on all bodies linking them with their EN 10204 3.1b material certification.

Types of Miniature Needle Valves & Pressure vs. Temperature

Miniature Needle Valves - Pressure vs Temperature Chart
Single Block Miniature Needle Valve

Single Isolate Hand Valve, 1/4" NPT female ends in 316 stainless steel, product code: MFF25S

  • Height, A in open position - 2.8" [71mm], Length, B - 2.0" [50mm] and Body Hex, C - 1.1" [28mm]
  • Weight - 0.28kg [0.6 lbs]

Options include

  • MMF for male inlet/ female outlet ends and MMM for male / male ends.
  • 38 for 3/8" NPT and 50 for 1/2" NPT ends.
  • /MTG - Two M5 tapped holes in the base of the needle valve to allow for panel mounting.
Single Block and Bleed Miniature Needle Valve

Block & Bleed Gauge Valve, 1/4" NPT female inlet, outlet and vent connections in 316 stainless steel, product code: MG12AFS/25F

  • Height, A in open position - 3.1" [80mm], Length, B - 2.5" [63mm] and Body Dia, C - 1.75" [45mm]
  • Offset Length, D - 2.7" [69mm], Weight - 0.75kg [1.6 lbs]

Options include

  • 38 for 3/8" NPT and 50 for 1/2" NPT ends.
  • /MTG - Two M5 tapped holes in the base of the needle valve to allow for panel mounting.
Double Block and Bleed Miniature Needle Valve

Double Block & Bleed Valve, 1/4" NPT female inlet, outlet and vent connections in 316 stainless steel, product code: MDBBINPMS/25F

  • Height, A in open position - 2.9" [75mm], Length, B - 3.2" [80mm] and Body Dia, C - 1.75" [45mm]
  • Offset Length, D - 3.2" [82mm], Overall Length, E - 4.1" [104mm], Weight - 0.9kg [2 lbs]

Options include

  • 38 for 3/8" NPT and 50 for 1/2" NPT ends.
  • /MTG - Two M5 tapped holes in the base of the needle valve to allow for panel mounting.