KMC VCZ-4104AMBD 1″ Pneumatic Zone Control Valve – 7.0 Cv, Fail-Open

The KMC VCZ-4104AMBD is a rugged OEM pneumatic globe zone valve designed to regulate hot or chilled water flow in HVAC applications. With a 1-inch two-way female NPT body and a high-flow coefficient (Cv 7.0), it operates on a pneumatic actuator pressure range of 3-8 PSI and is normally open (fail-open), ensuring safe operation in cases of loss of air supply.

Key Features & Benefits

• High flow capability: Cv 7.0, ideal for moderate piping applications.
• Pneumatic actuator range: 3-8 PSI for precision control.
• Normally Open (Fail-Open) design for default safe position.
• Durable materials: brass trim, neoprene diaphragm, glass-filled nylon actuator housing ensure long life and corrosion resistance.
• Compact size (7×6×5 in) and light weight (~3 lbs) facilitate installation even in tight spaces.

Technical Specifications

Applications & Use Cases

• Hot or chilled water control in VAV terminal unit reheat coils
• Fan coil units, induction units, finned tube convectors, and cast iron radiators
• Fail-safe HVAC settings: ensuring flow in event of air supply failure
• Commercial and institutional buildings where reliable zone control is required

Installation Tips & Best Practices

• Use correct supply air pressure (3-8 PSI) and verify actuator range.
• Ensure female NPT connections are properly sealed and aligned.
• Install with proper orientation to avoid strain on actuator body.
• Use replacement actuator parts without tools where supported.
• Inspect diaphragm and trim periodically for wear or leaks.

Why Choose Apex Controls

At Apex Controls, we stock the genuine KMC VCZ-4104AMBD zone valve with verified OEM specs. We provide detailed product information, fast shipping, and support to help you select the right valve for your system.