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. For use with air, water, and other fluids compatible with standard Buna seals. Hot water, steam, gasoline, and many oils require special seal materials.

2-Way Normally Open with all ports in body.
Heavy duty and made of stainless steel.
Wide range of orifice sizes from 1/32" to 1/8".

Valve specifications — Series 20 Model BP21 (Body Ported)
MAX. OPER. PRESS. DIFF.	ORIFICE SIZE	CV FACTOR	VALVE NUMBER GROMMET HOUSING		CONDUIT HOUSING
DC			1/8 NPT PORTS	1/4 NPT PORTS	1/8 NPT PORTS	1/4 NPT PORTS

1750*	1/32	.024	BP21G7DGM	BP21G9DGM	BP21G7DCM	BP21G9DCM
650*	3/64	.053	BP21H7DGM	BP21H9DGM	BP21H7DCM	BP21H9DCM
350	1/16	.095	BP21J7DGM	BP21J9DGM	BP21J7DCM	BP21J9DCM
200	3/32	.156	BP21K7DGM	BP21K9DGM	BP21K7DCM	BP21K9DCM
100	1/8	.201	BP21N7DGM	BP21N9DGM	BP21N7DCM	BP21N9DCM

* FKM seals not recommended for pressure above 500 psi.

Ordering Information:

When ordering valves or repair packs add voltage and frequency to complete valve number. for examples: valve (BP21K9DGM 120/60) repair pack (KBP21KDD DC)

When ordering operators add the letter “O” to the front of the valve number, replace body port number with the letter “D”: example: operator (OBP21KDDGM 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 — 7.7 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.), Aluminum or Brass (Opt.)
Internal Components: Stainless Steel. Copper – AC Only.
Elastomers: Nitrile (Buna) (Std.). Many other elastomers available.
Orifice Diameter: See table above.
Porting: See table above.
Housing: Grommet and 1/2" NPT conduit
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, Alternate Elastomers

Series 20 General Purpose Valves Conduit

Technical drawing — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS CONDUIT CONNECTION — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS CONDUIT CONNECTION

Technical drawing — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS CONDUIT CONNECTION — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS CONDUIT CONNECTION

Technical drawing — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS CONDUIT COIL CONNECTION — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS CONDUIT COIL CONNECTION

Technical drawing — MODEL BP21 METERING 2WNO BODY PORTS CONDUIT COIL CONNECTION — MODEL BP21 METERING 2WNO BODY PORTS CONDUIT COIL CONNECTION

Series 20 General Purpose Valves DIN

Technical drawing — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS DIN STYLE COIL — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS DIN STYLE COIL

Technical drawing — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS DIN STYLE COIL — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS DIN STYLE COIL

Technical drawing — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS DIN STYLE COIL — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS DIN STYLE COIL

Technical drawing — MODEL BP21 METERING 2WNO BODY PORTS DIN STYLE COIL — MODEL BP21 METERING 2WNO BODY PORTS DIN STYLE COIL

Series 20 General Purpose Valves Grommet

Technical drawing — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS GROMMET WITH LEADS — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS GROMMET WITH LEADS

Technical drawing — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS GROMMET WITH LEADS — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS GROMMET WITH LEADS

Technical drawing — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS GROMMET HOUSING WITH LEADS — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS GROMMET HOUSING WITH LEADS

Technical drawing — MODEL BP21 METERING 2WNO BODY PORTS GROMMET HOUSING WITH LEADS — MODEL BP21 METERING 2WNO BODY PORTS GROMMET HOUSING WITH LEADS

Series 20 General Purpose Valves Yoke Leads

Technical drawing — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS YOKE WITH LEADS — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS YOKE WITH LEADS

Technical drawing — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS YOKE WITH LEADS — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS YOKE WITH LEADS

Technical drawing — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS YOKE WITH LEADS — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS YOKE WITH LEADS

Technical drawing — MODEL BP21 METERING 2WNO BODY PORTS YOKE WITH LEADS — MODEL BP21 METERING 2WNO BODY PORTS YOKE WITH LEADS

Series 20 General Purpose Valves Yoke Spades

Technical drawing — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS YOKE WITH SPADE TERMINALS — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS YOKE WITH SPADE TERMINALS

Technical drawing — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS YOKE WITH SPADE TERMINALS — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS YOKE WITH SPADE TERMINALS

Technical drawing — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS YOKE WITH SPADE TERMINALS — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS YOKE WITH SPADE TERMINALS

Technical drawing — MODEL BP21 METERING 2WNO BODY PORTS YOKE WITH SPADE TERMINALS — MODEL BP21 METERING 2WNO BODY PORTS YOKE WITH SPADE TERMINALS

Series 20 General Purpose Valves Conduit/Bracket Connection

Technical drawing — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS CONDUIT/BRACKET CONNECTION — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS CONDUIT/BRACKET CONNECTION

Technical drawing — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS CONDUIT/BRACKET CONNECTION — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS CONDUIT/BRACKET CONNECTION

Technical drawing — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS CONDUIT/BRACKET COIL CONNECTION — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS CONDUIT/BRACKET COIL CONNECTION

Technical drawing — MODEL BP21 METERING 2WNO BODY PORTS CONDUIT/BRACKET COIL CONNECTION — MODEL BP21 METERING 2WNO BODY PORTS CONDUIT/BRACKET COIL CONNECTION

Series 20 General Purpose Valves Grommet/Bracket Connection

Technical drawing — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS GROMMET/BRACKET WITH LEADS — MODEL BP21 1/4-18 NPT 2WNO BODY PORTS GROMMET/BRACKET WITH LEADS

Technical drawing — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS GROMMET/BRACKET WITH LEADS — MODEL BP21 1/8-27 NPT 2WNO BODY PORTS GROMMET/BRACKET WITH LEADS

Technical drawing — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS GROMMET/BRACKET HOUSING WITH LEADS — MODEL BP21 MANUAL OVERRIDE 2WNO BODY PORTS GROMMET/BRACKET HOUSING WITH LEADS

Technical drawing — MODEL BP21 METERING 2WNO BODY PORTS GROMMET/BRACKET HOUSING WITH LEADS — MODEL BP21 METERING 2WNO BODY PORTS GROMMET/BRACKET HOUSING WITH LEADS

Nomenclature, all valve series except 58

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 BP21 (Body Ported)

2-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 Conduit/Bracket Connection

Series 20 General Purpose Valves Grommet/Bracket Connection

Cv Flow Formulae

Liquid Flow

Gas Flow P2 > 53% of P1 (subsonic)

Gas Flow P2 < 53% of P1 (sonic)