Unit of Measure

Valve Series

N/A 21V Series Medium Pressure Needle Valves

Valve Pattern

N/A 2-Way Angle / Replaceable Seat

Stem Type


O.D. Tube

N/A 3/4 in


N/A 0.438 in

Dimension A

N/A 7.56 in

Dimension B

N/A 4.25 in

Dimension C

N/A 2.25 in

Dimension D

N/A 0.43 in

Dimension E

N/A 0.63 in

Dimension F

N/A 1.76 in

Dimension H

N/A 10.31 in

Dimension I

N/A 1.50 in

Dimension J

N/A 3.00 in

Valve Panel Hole

N/A 1.25 in

Block Thickness

N/A 1.38 in

Extreme Temperature Option


Dimension G

N/A G Panel mounting screw thread size 10-24 UNC.

Special Designs for Extreme Temperatures

N/A Special Designs for Extreme Temperatures
Standard valves are supplied with Teflon/Carbon packing and may be operated to 450°F. High temperature packing and/or extended stuffing box are available for service from -423°F to 1200°F by adding the following suffixes to catalog order number.
  • TG standard valve with teflon glass packing to 600 °F.
  • GY standard valve with graphite braided yarn packing to 800 °F.
  • HT extended stuffing box valve with graphite braided yarn packing to 1200 °F.
  • B standard valve with cryogenic trim materials and Teflon packing to 100 °F.
  • LT extended stuffing box valve with teflon packing and cryogenic trim materials to -423 °F.

Medium Pressure Valves feature

N/A Medium Pressure Valves feature:
  • Rising stem design.
  • 316SS wetted parts for excellent corrosion resistance.
  • Metal-to-metal seating achieves bubble-tight shut-off, longer stem and seat life, greater durability for repeated open and close cycles.
  • PTFE and carbon packing with metal back-up rings offers reliable stem to body sealing.
  • Non-rotating stem prevents stem to seat galling.
  • Stem sleeve and packing gland materials have been selected to achieve optimum thread cycle life and reduced handle torque. All stem sleeve threads are rolled, assuring smooth operation.
  • Safety weep holes for all pressure connections and packing area.
  • Six different valve body patterns, with choice of vee or regulating type stem tip.

Repair Kits

N/A Consult your MAXPRO representative for repair kits and valve bodies. Refer to the Tools and Installation section for proper maintenance procedures.

Maximator Manufacturing

N/A MAXIMATOR has been designing and manufacturing high pressure equipment for more than thirty years and has a worldwide reputation for quality and reliability, backed by one of the best service organizations in the industry.


N/A MAXPRO offers a complete line of medium pressure fittings, tubing, check valves, line filters, anti-vibration fittings and safety head assemblies. All medium pressure valves and fittings use the medium pressure style connection. This coned and threaded co


N/A When selecting multiple items, the pressure rating would be that of the lowest rated component.

Terms and Conditions

  • All dimensions are for reference only and subject to change.
  • All general terms and conditions of sale, including limitations of our liability, apply to all products and services sold.
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