3-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 the 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".

Valve specifications — Series 20 Model 24
+ MAX. OPER. PRESS. DIFF.			ORIFICE SIZE		CV FACTOR		VALVE NUMBER GROMMET HOUSING		VALVE NUMBER CONDUIT HOUSING
AC		DC	INLET	EXH	INLET	EXH	1/8 NPT PORTS	1/4 NPT PORTS	1/8 NPT PORTS	1/4 NPT PORTS

400		400	1/32	1/32	.024	.024	24GG7XGM	24GG9ZGM	24GG7XCM	24GG9ZCM
150	(225)	150	3/64	1/16	.052	.095	24HJ7XGM	24HJ9ZGM	24HJ7XCM	24HJ9ZCM
100	(150)	100	1/16	1/16	.095	.095	24JJ7XGM	24JJ9ZGM	24JJ7XCM	24JJ9ZCM
100	(150)	100	1/16	3/32	.095	.156	24JK7XGM	24JK9ZGM	24JK7XCM	24JK9ZCM
100	(125)	100	1/16	1/8	.095	.284	24JN7XGM^	24JN9ZGM^	24JN7XCM^	24JN9ZCM^
75	(90)	75	3/32	1/8	.156	.284	24KN7XGM^	24KN9ZGM^	24KN7XCM^	24KN9ZCM^
30		30	1/8	1/8	.201	.284	24NN7XGM^	24NN9ZGM^	24NN7XCM^	24NN9ZCM^

^ VALVES WITH 1/8 N.O. ORIFICE ARE UL LISTED ONLY
+ Ratings in brackets are optional extended ratings; consult factory.

Ordering Information:

When ordering valves or repair packs add voltage and frequency to complete valve number. For example: valve (24JK9ZGM 120/60) repair pack (K24JKX AC)

When ordering operators add the letter “O” to the front of the valve number, replace body port number with the letter “D”: example: operator (O24JKDZGM 120/60)

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: 12/DC, 24/DC, 48/DC, 125/DC, 120/60-110/50, 240/60, and 24/60.
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. Copper – AC Only.
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, Female DIN Style Connector Part Numbers DIN COIL (2 TERMINALS W/GROUND) #20-198 & DIN COIL (3 TERMINALS W/GROUND) #20-19102

Series 20 General Purpose Valves Conduit

Technical drawing — MODEL 24 1/4-18 NPT 3WNO CONDUIT CONNECTION — MODEL 24
1/4-18 NPT 3WNO CONDUIT CONNECTION

Technical drawing — MODEL 24 1/8-27 NPT 3WNO CONDUIT CONNECTION — MODEL 24
1/8-27 NPT 3WNO CONDUIT CONNECTION

Technical drawing — MODEL 24 MANUAL OVERRIDE 3-WAY NORMALLY OPEN CONDUIT CONNECTION — MODEL 24
MANUAL OVERRIDE 3-WAY NORMALLY OPEN CONDUIT CONNECTION

Technical drawing — MODEL 24 METERING 3-WAY NORMALLY OPEN CONDUIT CONNECTION — MODEL 24
METERING 3-WAY NORMALLY OPEN CONDUIT CONNECTION

Series 20 General Purpose Valves DIN

Technical drawing — MODEL 24 1/4-18 NPT 3-WAY NORMALLY OPEN DIN STYLE COIL — MODEL 24
1/4-18 NPT 3-WAY NORMALLY OPEN DIN STYLE COIL

Technical drawing — MODEL 24 1/8-27 NPT 3-WAY NORMALLY OPEN DIN STYLE COIL — MODEL 24
1/8-27 NPT 3-WAY NORMALLY OPEN DIN STYLE COIL

Technical drawing — MODEL 24 MANUAL OVERRIDE 3-WAY NORMALLY OPEN DIN STYLE COIL — MODEL 24
MANUAL OVERRIDE 3-WAY NORMALLY OPEN DIN STYLE COIL

Technical drawing — MODEL 24 METERING 3-WAY NORMALLY OPEN DIN STYLE COIL — MODEL 24
METERING 3-WAY NORMALLY OPEN DIN STYLE COIL

Series 20 General Purpose Valves Grommet

Technical drawing — MODEL 24 1/4-18 NPT 3WNO GROMMET WITH LEADS — MODEL 24
1/4-18 NPT 3WNO GROMMET WITH LEADS

Technical drawing — MODEL 24 1/8-27 NPT 3WNO GROMMET WITH LEADS — MODEL 24
1/8-27 NPT 3WNO GROMMET WITH LEADS

Technical drawing — MODEL 24 MANUAL OVERRIDE 3-WAY NORMALLY OPEN GROMMET HOUSING WITH LEADS — MODEL 24
MANUAL OVERRIDE 3-WAY NORMALLY OPEN GROMMET HOUSING WITH LEADS

Technical drawing — MODEL 24 METERING 3-WAY NORMALLY OPEN GROMMET HOUSING WITH LEADS — MODEL 24
METERING 3-WAY NORMALLY OPEN GROMMET HOUSING WITH LEADS

Series 20 General Purpose Valves Yoke Leads

Technical drawing — MODEL 24 1/4-18 NPT 3-WAY NORMALLY OPEN YOKE WITH LEADS — MODEL 24
1/4-18 NPT 3-WAY NORMALLY OPEN YOKE WITH LEADS

Technical drawing — MODEL 24 1/8-27 NPT 3-WAY NORMALLY OPEN YOKE WITH LEADS — MODEL 24
1/8-27 NPT 3-WAY NORMALLY OPEN YOKE WITH LEADS

Technical drawing — MODEL 24 MANUAL OVERRIDE 3-WAY NORMALLY OPEN YOKE WITH LEADS — MODEL 24
MANUAL OVERRIDE 3-WAY NORMALLY OPEN YOKE WITH LEADS

Technical drawing — MODEL 24 METERING 3-WAY NORMALLY OPEN MOLDED COIL WITH YOKE — MODEL 24
METERING 3-WAY NORMALLY OPEN MOLDED COIL WITH YOKE

Series 20 General Purpose Valves Yoke Spades

Technical drawing — MODEL 24 1/4-18 NPT 3-WAY NORMALLY OPEN YOKE WITH SPADE TERMINALS — MODEL 24
1/4-18 NPT 3-WAY NORMALLY OPEN YOKE WITH SPADE TERMINALS

Technical drawing — MODEL 24 1/8-27 NPT 3-WAY NORMALLY OPEN YOKE WITH SPADE TERMINALS — MODEL 24
1/8-27 NPT 3-WAY NORMALLY OPEN YOKE WITH SPADE TERMINALS

Technical drawing — MODEL 24 MANUAL OVERRIDE 3-WAY NORMALLY OPEN YOKE WITH SPADE TERMINALS — MODEL 24
MANUAL OVERRIDE 3-WAY NORMALLY OPEN YOKE WITH SPADE TERMINALS

Technical drawing — MODEL 24 METERING 3-WAY NORMALLY OPEN YOKE WITH SPADE TERMINALS — MODEL 24
METERING 3-WAY NORMALLY OPEN YOKE WITH SPADE TERMINALS

Series 20 General Purpose Valves Grommet/Bracket Connection

Technical drawing — MODEL 24 1/4-18 NPT 3WNO GROMMET/BRACKET WITH LEADS — MODEL 24
1/4-18 NPT 3WNO GROMMET/BRACKET WITH LEADS

Technical drawing — MODEL 24 1/8-27 NPT 3WNO GROMMET/BRACKET WITH LEADS — MODEL 24
1/8-27 NPT 3WNO GROMMET/BRACKET WITH LEADS

Technical drawing — MODEL 24 MANUAL OVERRIDE 3WNO GROMMET/BRACKET HOUSING WITH LEADS — MODEL 24
MANUAL OVERRIDE 3WNO GROMMET/BRACKET HOUSING WITH LEADS

Technical drawing — MODEL 24 METERING 3WNO GROMMET/BRACKET HOUSING WITH LEADS — MODEL 24
METERING 3WNO GROMMET/BRACKET HOUSING WITH LEADS

Series 20 General Purpose Valves Conduit/Bracket Connection

Technical drawing — MODEL 24 1/4-18 NPT 3WNO CONDUIT/BRACKET CONNECTION — MODEL 24
1/4-18 NPT 3WNO CONDUIT/BRACKET CONNECTION

Technical drawing — MODEL 24 1/8-27 NPT 3WNO CONDUIT/BRACKET CONNECTION — MODEL 24
1/8-27 NPT 3WNO CONDUIT/BRACKET CONNECTION

Technical drawing — MODEL 24 MANUAL OVERRIDE 3WNO CONDUIT/BRACKET CONNECTION — MODEL 24
MANUAL OVERRIDE 3WNO CONDUIT/BRACKET CONNECTION

Technical drawing — MODEL 24 METERING 3WNO CONDUIT/BRACKET CONNECTION — MODEL 24
METERING 3WNO CONDUIT/BRACKET CONNECTION

Series 20 Operators Conduit

Technical drawing — MODEL O24 1/8-27 NPT 3WNO CONDUIT CONNECTION — MODEL O24
1/8-27 NPT 3WNO CONDUIT CONNECTION

Technical drawing — MODEL O24 1/4-18 NPT 3WNO CONDUIT CONNECTION — MODEL O24
1/4-18 NPT 3WNO CONDUIT CONNECTION

Series 20 Operators DIN

Technical drawing — MODEL O24 1/8-27 NPT 3WNO DIN STYLE COIL — MODEL O24
1/8-27 NPT 3WNO DIN STYLE COIL

Technical drawing — MODEL O24 1/4-18 NPT 3WNO DIN STYLE COIL — MODEL O24
1/4-18 NPT 3WNO DIN STYLE COIL

Series 20 Operators Explosion Proof

Technical drawing — MODEL O24 1/8-27 NPT 3WNO EXPLOSION PROOF — MODEL O24
1/8-27 NPT 3WNO EXPLOSION PROOF

Technical drawing — MODEL O24 1/4-18 NPT 3WNO EXPLOSION PROOF — MODEL O24
1/4-18 NPT 3WNO EXPLOSION PROOF

Series 20 Operators Grommet

Technical drawing — MODEL O24 1/8-27 NPT 3WNO GROMMET WITH LEADS — MODEL O24
1/8-27 NPT 3WNO GROMMET WITH LEADS

Technical drawing — MODEL O24 1/4-18 NPT 3WNO GROMMET WITH LEADS — MODEL O24
1/4-18 NPT 3WNO GROMMET WITH LEADS

Series 20 Operators Yoke Leads

Technical drawing — MODEL O24 1/8-27 NPT 3WNO MOLDED COIL WITH YOKE — MODEL O24
1/8-27 NPT 3WNO MOLDED COIL WITH YOKE

Technical drawing — MODEL O24 1/4-18 NPT 3WNO MOLDED COIL WITH YOKE — MODEL O24
1/4-18 NPT 3WNO MOLDED COIL WITH YOKE

Series 20 Operators Yoke Spades

Technical drawing — MODEL O24 1/8-27 NPT 3WNO YOKE WITH SPADE TERMINALS — MODEL O24
1/8-27 NPT 3WNO YOKE WITH SPADE TERMINALS

Technical drawing — MODEL O24 1/4-18 NPT 3WNO YOKE WITH SPADE TERMINALS — MODEL O24
1/4-18 NPT 3WNO YOKE WITH SPADE TERMINALS

Series 20 Operators Conduit/Bracket Connection

Technical drawing — MODEL O24 3WNO CONDUIT/BRACKET CONNECTION — MODEL O24 3WNO CONDUIT/BRACKET CONNECTION

Series 20 Operators Grommet/Bracket Connection

Technical drawing — MODEL O24 3WNO GROMMET/BRACKET HOUSING WITH LEADS — MODEL O24 3WNO GROMMET/BRACKET HOUSING WITH LEADS

Cv Flow Formulae

PeterPaul has created this page for you so you can calculate the flow or Cv (flow coefficient) to make the relationship visible between the pressure drop (the difference in pressure between two points of a liquid/gas carrying network) and the flow rate.

The use of this flow coefficient (Cv) calculator offers a standard calculation to compare valve capacities and sizing for a wide range of applications. The type and sizing of a valve or regulator can have a large impact on the performance of the assembly for transferring gas or liquids in the system.

Our sales department is ready to answer questions and to solve your valve needs. Please feel free to call, chat or email us.

Liquid Flow

Calculate Flow in GPM

P1−P2

PSI

Specific gravity

Flow

GPM

Calculate Cv

Flow

GPM

P1−P2

PSI

Specific gravity

Calculate P1−P2

Specific gravity

Flow

GPM

P1−P2

PSI

Gas Flow P2 > 53% of P1 (subsonic)

Calculate Flow in CFM

PSIA

Specific gravity

Temp (460° + °F)

°R

Flow

CFM

Calculate Cv

Flow

CFM

PSIA

Specific gravity

Temp (460° + °F)

°R

Calculate P1 (approx.)

Flow

CFM

PSIA

Specific gravity

Temp (460° + °F)

°R

PSIA

Calculate P2 (approx.)

Flow

CFM

PSIA

Specific gravity

Temp (460° + °F)

°R

PSIA

Gas Flow P2 < 53% of P1 (sonic)

Calculate Flow in CFM

PSIA

Specific gravity

Temp (460° + °F)

°R

Flow

CFM

Calculate Cv

Flow

CFM

PSIA

Specific gravity

Temp (460° + °F)

°R

Calculate P1

Flow

CFM

Specific gravity

Temp (460° + °F)

°R

PSIA

DISCLAIMER: Gas flow is only an approximation using Cv.

Series 20 Model 24

3-Way Normally Open Valve

Ordering Information:

Operating Conditions

Electrical Characteristics

Mechanical Characteristics

Series 20 General Purpose Valves Conduit

Series 20 General Purpose Valves DIN

Series 20 General Purpose Valves Grommet

Series 20 General Purpose Valves Yoke Leads

Series 20 General Purpose Valves Yoke Spades

Series 20 General Purpose Valves Grommet/Bracket Connection

Series 20 General Purpose Valves Conduit/Bracket Connection

Series 20 Operators Conduit

Series 20 Operators DIN

Series 20 Operators Explosion Proof

Series 20 Operators Grommet

Series 20 Operators Yoke Leads

Series 20 Operators Yoke Spades

Series 20 Operators Conduit/Bracket Connection

Series 20 Operators Grommet/Bracket Connection

Cv Flow Formulae

Liquid Flow

Gas Flow P2 > 53% of P1 (subsonic)

Gas Flow P2 < 53% of P1 (sonic)