RG91-08 - TECVAL,S.L., 2022 all rights reserved.
Precise Micro-flow Regulating Valve (FxF)
Working Pressures: 100 | 210 bar (1500 | 3000 PSI)

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.


Male-Female end connections.  C 
Degreased for oxygen service.  D 
High working pressure 210 bar (3000 PSI). (Not available in Brass).  I 
Automation through electric multi-turn actuator.  T 
Handle safety lockout.  W 
Technical data
Max. Pressure Standard working pressure: 100 bar (1500 PSI) High working pressure 210 bar (3000 PSI)
Temperatures -20ºC / 200ºC (-4ºF / 392ºF)
Dimensions 1/8" 1/8" 1/4" 1/4"
A Open70707070
A Closed53535353
Orifice Size 2 4 2 4
Maximum Cv 0.09 0.31 0.09 0.31
Order codes

* Dimensions in mm
NÂșPartBrass  LA AISI-316L  A4 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
Special alloys

Among the wide range of alloys existing, TECVAL has selected those considered by our customers as most suitable, which we stock to ensure a quick and effective supply. Whether you do not find the required alloy or need further information about our exotic alloys valves and fittings, please address your inquiry to our Technical Department:

AISI-316Ti (1.4571)  A6 , AISI-904L (1.4539)  A9 , Duplex (1.4462)  AD , SuperDuplex (1.4410/1.4501)  AS , 254-SMO (1.4547)  AV , Alloy 400 (2.4360)  MO , Alloy 625 (2.4856)  IN , Alloy 825 (2.4858)  CO , Titanium Gr.2 (1.7864)  TI , Hastelloy C-276 (2.4819)  HA 

Ordering information

References are formed by three parts:

 Valve Code 
Look for it in the order codes chart on the previous page.
..  Option/s 
-If required, add the code/s from the options section on the previous page (in alphabetical order)
...  Material 
-Look for the code on the materials chart.

An example of valve with one option:

Needle valve RG-91 1/4"NPT Brass orifice size 2 mm. with panel nut:
 4818   X   LA  The reference required to place the order is 4818XLA.



100% tested in accordance to API STANDARD 598. Each valve is tested to check the leakage in the seats and packing. Upon request, the corresponding materials and test certificates can be delivered with the valve.


All TECVAL valves are supplied packed in individual polyethilene airtight bags, which include the general features of the valve. End screw connections are protected with polyethilene caps. Everything is 100% recyclable.


Adjustment of the packing may be necessary during the working life of the valve. The operation consists of turning the nut (4) clockwise.
Valves with long no-working period may have a harder initial operating torque.

C/Colom, 519 - Pol.Can Parellada - 08228-TERRASSA - Barcelona - SPAIN | Tel: +34 938 280 055 | email: tecval@tecval.es