Series 20 Model 21

2-Way Normally Open Valve

A complete line of valves with a great selection of options and exceptional proven performance. The standard in the field. Air, water, and other fluids compatible with standard Buna seals. Hot water, steam, gasoline, and many oils require special seal materials.

• The flagship valve initially created for fluid power industry.
• Heavy duty and made of stainless steel.
• A real workhorse with proven performance.
• It has the greatest amount of options available of all the valves.
• Wide range of orifice sizes from 1/32" to 1/8".

  • SPECIFICATIONS
  • 2-D & 3-D CAD DRAWING
  • FLOW CHART
  • NOMENCLATURE

VALVE SPECIFICATIONS

+ MAX. OPER.
PRESS. DIFF.
ORIFICE SIZE CV FACTOR VALVE NUMBER
GROMMET HOUSING
CONDUIT HOUSING
AC DC  N.O.  N.O. 1/8 NPT PORTS 1/4 NPT PORTS 1/8 NPT PORTS 1/4 NPT PORTS
400 (700)* 400 (700)* 1/32 .024 21G7XGM 21G9ZGM 21G7XCM 21G9ZCM
235 (500) 235 (500) 3/64 .053 21H7XGM 21H9ZGM 21H7XCM 21H9ZCM
150 (350) 150 (350) 1/16 .095 21J7XGM 21J9ZGM 21J7XCM 21J9ZCM
100 (150) 100 (150) 3/32 .156 21K7XGM 21K9ZGM 21K7XCM 21K9ZCM
35 (40) 35 (40) 1/8 .201 21N7XGM ^ 21N9ZGM ^ 21N7XCM ^ 21N9ZCM ^

^ VALVES WITH 1/8 SLEEVE N.O. ORIFICE ARE UL LISTED ONLY
* FKM seals not recommended for pressure ratings above 500 PSI.

WHEN ORDERING VALVES OR REPAIR PACKS ADD VOLTAGE AND FREQUENCY TO COMPLETE
VALVE NUMBER. EXAMPLES: VALVE (21J9ZGM-120/60) REPAIR PACK (K21JDX-AC)

+ Ratings in brackets are optional extended ratings; consult factory.

OPERATING CONDITIONS

Media: Air, water, and other fluids compatible with standard Buna seals. Hot water, steam, gasoline, and many oils require special seal materials. (Series 20 pressure ratings may change due to the viscosity of the liquid.)*
Valve Temperature Range: Standard Valves – 0°F (-18°C) to 104°F (40°C) ambient; 0°F (-18°C) to 150°F (65°C) media. Optional Valves – can tolerate much higher or much lower ambient and media temperatures.
Maximum Operating Pressure Differentials: See table above.
Burst Pressure: 5000 PSI
Leakage: Bubble tight for standard valves.
Vacuum: To 5 Microns*

ELECTRICAL CHARACTERISTICS

Coil Voltage: 6 to 825V AC 60 HZ. and 5 to 720V AC 50 HZ. — 1.8 to 265V DC
Nominal Power: AC — 8.7 Watts DC — 9.5 Watts
Coil Construction: Molded (Std.), Non-molded Class A and Potted Class F or Class H (Opt.)
Typical Response Time on Air: 4 - 16 Milliseconds
Operating Speed: Up to 600 CPM
Duty Cycle: Continuous

MECHANICAL CHARACTERISTICS

Body: Stainless Steel (Std.) or Brass (Opt.)
Internal Components: Stainless Steel
Elastomers: Nitrile (Buna) (Std.). Many other elastomers available.*
Orifice Diameter: See table above
Porting: Standard 1/8" and 1/4" NPT (other ports available)*
Housing: Grommet and 1/2" NPT conduit - many options available.*
Listings: Most valves are UL and CSA listed.*
Life Expectancy: Millions of cycles, depending on application, lubrication, etc.
Valve Weight: Grommet Valve: 1.13 lb Conduit Valve: 1.19 lb
Repair Packs: See table above.
Options: Alternate Port Locations, Metering, Manual Override, Alternate Elastomers, Spade Terminal Coil,
European Style DIN, Explosion Proof and Magnetic Latching Coil

* Consult representative or factory for options and specifications.

Series 20 General Purpose Valves Conduit


MODEL 21 1/4-18 NPT
2WNO CONDUIT CONNECTION

MODEL 21 1/8-27 NPT
2WNO CONDUIT CONNECTION

MODEL 21 BODY OPTION "O"
2WNO
CONDUIT COIL CONNECTION

MODEL 21 MANUAL OVERRIDE
2WNO
CONDUIT COIL CONNECTION

Series 20 General Purpose Valves Conduit/Bracket Connection


MODEL 21 1/4-18 NPT
2WNO
CONDUIT/BRACKET CONNECTION

MODEL 21 1/8-27 NPT
2WNO
CONDUIT/BRACKET CONNECTION

MODEL 21 BODY OPTION "O"
2WNO
CONDUIT/BRACKET COIL CONNECTION

MODEL 21 MANUAL OVERRIDE
2WNO
CONDUIT/BRACKET CONNECTION

Series 20 General Purpose Valves DIN


MODEL 21 1/4-18 NPT
2WNO
DIN STYLE COIL

MODEL 21 1/8-27 NPT
2WNO
DIN STYLE COIL

MODEL 21 BODY OPTION "O"
2WNO
DIN STYLE COIL

MODEL 21 MANUAL OVERRIDE
2WNO
DIN STYLE COIL

Series 20 General Purpose Valves Grommet


MODEL 21 1/4-18 NPT
2WNO GROMMET WITH LEADS

MODEL 21 1/8-27 NPT
2WNO GROMMET WITH LEADS

MODEL 21 BODY OPTION "O"
2WNO
GROMMET HOUSING WITH LEADS

MODEL 21 MANUAL OVERRIDE
2WNO
GROMMET HOUSING WITH LEADS

Series 20 General Purpose Valves Grommet/Bracket Connection


MODEL 21 1/4-18 NPT
2WNO
GROMMET/BRACKET WITH LEADS

MODEL 21 1/8-27 NPT
2WNO
GROMMET/BRACKET WITH LEADS

MODEL 21 BODY OPTION "O"
2WNO
GROMMET HOUSING WITH LEADS

MODEL 21 MANUAL OVERRIDE
2WNO
GROMMET/BRACKET HOUSING WITH LEADS

Series 20 General Purpose Valves Yoke Leads


MODEL 21 1/4-18 NPT
2WNO
MOLDED COIL WITH YOKE

MODEL 21 1/8-27 NPT
2WNO
MOLDED COIL WITH YOKE

MODEL 21 BODY OPTION "O"
2WNO
YOKE WITH LEADS

MODEL 21 MANUAL OVERRIDE
2WNO
MOLDED COIL WITH LEADS

Series 20 General Purpose Valves Yoke Spades


MODEL 21 1/4-18 NPT
2WNO
SPADE COIL WITH YOKE

MODEL 21 1/8-27 NPT
2WNO
SPADE COIL WITH YOKE

MODEL 21 BODY OPTION "O"
2WNO
YOKE WITH SPADES

MODEL 21 MANUAL OVERRIDE
2WNO
YOKE WITH SPADE TERMINALS