Caleffi MixCal 521510A Brass 3-Way Adjustable Thermostatic and Pressure Balanced Mixing Valve with Temperature Gauge, 3/4", NPT

Cash Acme 24644 DZR Brass Thermostatic Mixing Valve Kit for HeatGuard Tank Booster Pro Water Heaters, 3/4", NPSH (Inlet) x MPT (Outlet) x FNPT Union

Taco heat motor zone valves provide a time proven method for system zoning and control. The exclusive heat motor design operates silently, while the twist off head allows for serviceability without disturbing system connections.

• Heat motor zone valves provide a convenient way to create individual zones or equipment isolation in a hydronic heating system
• Using multiple heat motor zone valves and a single pump, you can start, stop or divert flow through the system to provide individual room or area comfort control and energy savings
• Rugged dependability
• Silent operation
• Twist off head
• Bellows valve construction ensures positive shut-off and leak proof operation
• Patented construction
• Easy-to-install
• Manual open lever
• 100% factory tested
• 24 VAC powered with isolated end switch
• Made in USA
• 3 year head, 5 year body warranty

Sid Harvey Item #:B163-78: Replaces Part #:'s : 21470,
,

Taco heat motor zone valves provide a time proven method for system zoning and control. The exclusive heat motor design operates silently, while the twist off head allows for serviceability without disturbing system connections.

• Heat motor zone valves provide a convenient way to create individual zones or equipment isolation in a hydronic heating system
• Using multiple heat motor zone valves and a single pump, you can start, stop or divert flow through the system to provide individual room or area comfort control and energy savings
• Rugged dependability
• Silent operation
• Twist off head
• Bellows valve construction ensures positive shut-off and leak proof operation
• Patented construction
• Easy to install
• Manual open lever
• 100% factory tested
• 24 VAC powered with isolated end switch
• Made in USA
• 3 years head, 5 years body warranty

Sid Harvey Item #:B163-76: Replaces Part #:'s : B163-1 | B163-1R | ZVA3034-B163-76,

,

Taco B163-76

Watts Regulators series 1156F 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. It also provides make-up water to the system in the event of system leaks. It consists of an iron and 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. Series 1156F has high capacity performance and simplified servicing design.

• Tight seating check valve
• Purge lever for manual purging
• High capacity performance as well as unique simplified servicing accessibility for complete unitized maintenance
• Stainless steel strainer to protect the valve disc from fouling
• Designed to fill the boiler and system piping with water and to maintain water pressure in the system at all times
• Provide make up water to the system in the event of system leaks
• 15 psi factory set, 100 psi maximum working pressure

Sid Harvey Item #:SB1156F: Replaces Part #:'s : R55-794,
,

Honeywell MZV520-RP/U Bronze Operator Zone Valve, 24 VAC at 60 Hz

• Rack and pinion linear design
• Fast acting, 15 sec to open, 5 sec to close
• 2-piece rack design to extend service life
• Low power consumption, 8 valves, 40 VA transformer
• External valve position indicator
• Quiet operation, no water hammer
• Built-in tamper resistant balancing valve for pre-balancing
• High torque, constant speed synchronous motor
• Cooler running, longer life motor
• Operator can be replaced without draining system
• Manual opening feature
• Replaceable valve cartridge
• Large adjustable flow, 1/2" 3/4" Cu 5.8, 1" 7 Cu, 1-1/4" Cu 7
• 4-wire operator with auxiliary switch
• 2-wire without switch, 24" leads
• Compatible with programmable thermostats
• 30 mm collar (valve/actuator interface)
• SPST auxiliary end switch

Sid Harvey Item #:MZV520RP: Replaces Part #:'s : 34325,
,

Safgard EL1220-SV Ceramic Sensor Probe 1/2" NPT

,
,

Mcdonnell & Miller 150S Low Water Cut-Off, 120/240 VAC, 150 psi, Automatic Reset

• Monel bellows provides corrosion resistance
• Cut-off and alarm actuation
• With pump controller

Sid Harvey Item #:B109: Replaces Part #:'s : 3W240,
,

Tower Equipment B331 Control Valve 3-Way 1-1/4" Nickel Plated Over Brass

Tower Equipment B350 Control Valve 3-Way 2" Nickel Plated Over Brass

Bell & Gossett Comfort-Trol 109054 Operator and Bonnet Assembly Conversion Kit for Zone Control Valves, 3/4", Sweat

• MCP-12 operator and bonnet assembly conversion kit converts modumate (old style) valves to comfort trol (new style) valves
• 24 VAC , 50/60 Hz single phase operator
• Unique torsion spring for smooth opening and closing
• Reliable leaf-type stack switch
• solderless electrical connection

Sid Harvey Item #:B162-3: Replaces Part #:'s : 3437,
,

Xylem 354001 Cut-Off Switch 24 VAC Manual Reset W/Quick Hook-Up Fittings 64/67