©Johnstone Supply eCatalog 216

HYDRONICS Valves

Air Vents • Vents the accumulation of troublesome air • L39-686 “coin operated” air vent specially designed for new types of radiators

• 150 PSI maximum pressure Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

A

B

C

D

Fig. Order #

Mfg. #

Model #

Type

Conn. Size

Height 4-3/4” 3-1/8” 9-5/8”

Width 2-1/4” 1-7/8” 4-1/2”

L39-688 L39-687 L39-689 L39-686

A B C D

113021 87 113222 97 113076 107A 113055 4V

Automatic Automatic

3/4” NPTM, 1/2” NPTF

1/8” NPTM 3/4” NPTF 1/8” NPTM

High Capacity

Manual

5/8”

5/8”

Air Vents • L44-652 and L44-650 float type automatic air vent designed to vent air that is released from the water while being treated • Check valve on L44-650 allows an easy replacement of air vent without purging the system

• L44-651 radiator air vent valve designed to remove automatically any air trapped inside the heat emitters both during the filling of the system and in normal operation WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

A

Fig. Order #

Mfg. #

Description 1/8" NPT 1/8" NPT 1/8" NPT

Max. Pressure

Max. Operating Temp.

L44-650 L44-651 L44-652

A B C

502710A 508013A 502610A

150 PSI 150 PSI 150 PSI

240 212 240

B

C

Air Vents • Built-in check valve • L41-552 is tapped at top for 1/8" NPT safety drain connection

• L37-379 is compatible with low pressure steam WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Fig. Order #

Mfg. #

Model # Conn. Size

Max. Pressure

L41-552 L37-379

A B

401488 79 401475 508

1/2" NPT female and 3/4"NPT male 75 PSI

A

B

1/8" NPT

50 PSI (Water) / 15 PSI (Steam)

505

JohnstoneSupply.com