3/4" NPT Variable Orifice Low Lead Manual Balancing Valve (5.0 Cv)

Caleffi 142 series low lead manual balancing valves are used to measure and adjust the fluid flow rate in hydronic or plumbing circuits. Characterized flow plug which provides precise system balancing valves and highly accurate flow compared to other setters with ball valve control. Turning the knob moves a plug within the fluid stream which varies the flow rate. The flow rate is determined according to the pressure drop value measured by a differential pressure meter connected to the pressure test ports, included. The flow rate is directly determined from the pressure differential created across the two test ports as fluid passes the adjustment plug. The valve design is variable orifice with pressure ports located upstream and downstream of the adjustment plug. Compared to fixed orifice designs where both test ports are located upstream of the adjustment plug, for a given size and flow rate, the variable orifice design produces a greater differential pressure value. In very low flow rate applications and with good fluid quality, this larger differential pressure signal can result in more accurate balancing. A memory stop feature allows the valve to be closed, and later reopened to the original set position. Insulation shells are available, purchase separately.

Features:

• Variable orifice.
• Memory stop feature.
• Characterized plug for smooth adjustment.
• Max working pressure: 232 psi Working temp range: 14° - 250°F
• DZR low-lead brass body.
• Certified low lead.