Caleffi Z50 : 2-Way Valve, Inverted Flare, 3.5 Cv, 30 psi ΔP, NA61241 Retrofit Kit, Normally Closed Spring Return Valve Actuator, 24V AC, On/Off Control Signal, (1) SPST 0.4A Auxiliary Switch, Terminal Block

Caleffi Z50 : 2-Way Valve, Inverted Flare, 3.5 Cv, 30 psi ΔP, NA61241 Retrofit Kit, Normally Closed Spring Return Valve Actuator, 24V AC, On/Off Control Signal, (1) SPST 0.4A Auxiliary Switch, Terminal Block

The Caleffi Z50 is a 2-way motorized zone valve assembly featuring an inverted flare valve body and a Z151000 normally closed spring-return actuator with screw terminal connections. It includes the NA61241 retrofit kit for convenient installation or replacement in existing hydronic systems. Designed for efficient on/off control, the Z50 ensures dependable performance and automatic closure when power is removed.

This model is UL873, cULus Listed, and CE certified, meeting UL 1995 section 18 standards for air plenums and ducts. The actuator provides reliable spring-return operation and includes an integrated SPST auxiliary microswitch for system feedback or interlock control. The brass valve body with stainless steel stem and EPDM rubber seals guarantees long-term durability in hydronic heating and cooling applications.

Key Features

• 2-way motorized zone valve assembly with inverted flare connection
• Includes NA61241 retrofit kit for simple installation or replacement
• Normally closed actuator (Z151000) with spring-return function
• Screw terminal connection for secure and accessible wiring
• Integrated SPST auxiliary microswitch (0.4A @ 24V AC)
• UL, cULus, and CE certified for air plenum and duct applications

Technical Specifications

• Valve Type: 2-Way Straight
• Connection Type: Inverted Flare
• Maximum Operating Pressure: 300 psi
• Maximum ΔP: 30 psi
• Cv Rating: 3.5 gpm
• Medium Temperature Range: 32–240 °F
• Electric Supply: 24V AC
• Power Consumption: 7 VA (at full capacity)
• Auxiliary Switch Rating: 0.4A @ 24V AC
• Maximum Glycol Concentration: 50%
• Medium: Water, glycol solutions, vapor (max 15 psi)

Datasheets

	Caleffi Z-One Zone Valve Technical Brochure
	Caleffi Z-One Motorized Zone Valve Installation and Commissioning Manual
	Caleffi Z50 Sell Sheet
	Submittal Data