©Johnstone Supply eCatalog 216

HYDRONICS Valves

Pressure Reducing Valves • Automatically feeds water whenever pressure drops below PSI setting • Fast-fill lever lock • Not for potable water applications Specifications: • Maximum fluid temperature: 212°F

• Maximum inlet pressure: 100 PSI • Factory settings: 12 PSI WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Order #

Mfg. # Conn. Size

Pressure Range PSIG Body Type

L41-607 L41-608

329-3 1/2" Sweat (Inlet), 1/2" NPT (Outlet) 335-3 3/4" NPT (Inlet), 3/4" NPT (Outlet)

10 to 25 10 to 50

Cast Iron

Bronze

Feed Water Pressure Regulators • Adjustable range 10–25 lbs.; pre-set to 15 PSI • Maximum temperature: 212°F • Maximum pressure: 100 PSI • All 1/2" models furnished with purge lever

• Product is not approved for potable water usage based on overall lead content • R55-794 has bronze valve body with union solder inlet connection

Outlet Pressure Range PSI

Outlet Pressure Preset PSI

Order # Mfg. #

Model #

Inlet Conn.

Outlet Conn.

Conn. Size

R54-572 0386423 1156F-STD 1/2 1/2" NPT

1/2 IN 1/2 IN

1/2" 1/2"

10-25 10-25

15 15

R55-794

386422 SB1156F

1/2" Union Solder

Water Pressure Regulator • Bronze high capacity feed water pressure regulators are for use in commercial and residential hydronic heating systems to fill the boiler and piping system with water, and to maintain water pressure in the system at all times

• Product is not approved for potable water usage based on overall lead content • Consists of a bronze body construction with NPT threaded inlet and outlet connections, a tight seating check valve, purge lever for manual purging, and a stainless steel strainer

Outlet Pressure Range PSI

Outlet Pressure Preset PSI

Order # Mfg. # R56-896 0386421

Model #

Inlet Conn.

Outlet Conn.

Conn. Size

TB1156F 1/2" NPT 1/2" NPT 1/2"

10-25

15

Cartridge Style Pressure Reducing Valves • Automatically feeds water whenever pressure drops below PSI setting • Easy-to-see dial on cartridge adjusts PSI setting • Built-in check valve on outlet • One-piece cartridge can be replaced or serviced without draining the system • Fast-fill button delivers increased flow to speed system fill times

• 1/2" bottom tapping for pressure relief valve or expansion tank Specifications: • Maximum fluid temperature: 180°F • Maximum inlet pressure: 230 PSI • Factory settings: 12 PSI WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Order #

Mfg. #

Conn. Size 1/2" Union 1/2" NPT

Pressure Range PSIG

L41-604 L41-605

3350-3 3350-T3

10 to 50 10 to 50

Feed Water Pressure Regulator Dual Controls For Boilers • Used on boiler feed lines to provide make-up water to the system

Specifications: • Maximum pressure: 100 PSI • Maximum temperature: 212°F (100°C) • Regulator set at: 15 PSI • Adjustment range: 10–25 PSI

• Combines water pressure regulator and an iron body diaphragm relief valve set at 30 PSI • Product is not approved for potable water usage based on overall lead content

Outlet Pressure Range PSI

Outlet Pressure Preset PSI

Fig. Order # Mfg. #

Model # Inlet Conn.

Conn. Size

A

B

R54-740 388805 T1450F Female Threaded

A A B

1/2" Threaded 10-25

30 30 30

R54-741 R57-230

388800 S1450F Union Joint 0388798 1450F 1/2" Threaded

1/2" Sweat

10-25

1/2" Threaded 10-25

501

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