Needle Valves: RG-91

Precise Micro-flow Regulating Valve (FxF)
Working Pressures: 100 | 210 bar (1500 | 3000 PSI)

TECVAL tecval-rg-91-micro-flow-regulating-valves-2-

TECVAL RG-91 regulating and sealing valves are especially suitable to guarantee a fine micro-flow control under high pressure or moderate vacuum service. They are commonly used to regulate flows in analysis equipment, sampling systems in laboratories, gas chromatography, flow meters, etc…


  • Precise, uniform and constant regulation.
  • 2 o 4 mm flow orifice size.
  • Solid forged body.
  • Easy packing external adjustment.
  • Compact design.
  • PTFE packing.
  • 100% tested.


  • Panel Nut
  • Degreased for oxygen service.
  • Male-Female end connections.
  • Handle safety lockout.
  • High working pressure 210 bar (3000 PSI) only available in AISI-316L.

Technical data

Maximum Pressure

Standard working pressure: 100 bar (1500 PSI)

High working pressure 210 bar (3000 PSI)

Temperature Range

-20ºC / 200ºC (-4ºF / 392ºF)


Threaded NPT (ANSI B1.20.1)
Threaded BSP (DIN ISO 228-1)

Dimensions 1/8"1/8"1/4"1/4"
A Open70707070
A Closed53535353
Orifice Size 2424
Flow Coefficient (Cv) 0.090.310.090.31

Brass (2.0402)

AISI-316L (1.4404)

Special alloys (For detailed information consult attached data sheet)


PartBrass AISI-316L Special alloys 
1 Set screwAISI-304 (1.4301)AISI-304 (1.4301)AISI-304 (1.4301)
2 WasherAISI-304 (1.4301)AISI-304 (1.4301)AISI-304 (1.4301)
3 Hand wheelRed polyamidRed polyamidRed polyamid
4 NutBrass (2.0401)AISI-316L (1.4404)AISI-316L (1.4404)
5 Panel nutBrass (2.0401)AISI-316L (1.4404)AISI-316L (1.4404)
6 GlandBrass (2.0401)AISI-316L (1.4404)AISI-316L (1.4404)
7 PackingP.T.F.E.P.T.F.E.P.T.F.E.
8 StemAISI-316L (1.4404)AISI-316L (1.4404)Special alloy
9 BodyBrass (2.0402)AISI-316L (1.4404)Special alloy
TECVAL rg91-desp-cotes-fitxa-antiga
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