Product range: 132 Series:   Balancing valve with flow meter…. sizes 1/2″, 3/4″ 1″, 1 1/4″, 1 1/2″, and 2″


The 132 series balancing valve accurately sets the flow rate of heating and cooling transfer fluid supplied to fan coils and terminal units or where flow balancing is required in solar thermal systems. Proper hydronic system balancing ensures that the system operates according to design specifications, providing satisfactory thermal comfort with low energy consumption. The flow meter is housed in a bypass circuit on the valve body and can be shut off during normal operations. The flow meter permits fast and easy circuit balancing without added differential pressure gauges and reference charts. the balancing valve is furnished with a pre-transformed insulation shell to optimize thermal performance for both hot and cold water systems. Patent application no. M12007A000703

Technical Specifications:


Advantages of balanced circuits

Balanced circuits have the following principal benefits:

  1. The system emitters operate properly in heating, cooling and dehumidification, saving energy and providing greater comfort.
  2. The zone circuit pumps operate at maximum efficiency, reducing the risk of overheating and excessive wear.
  3. High fluid velocities which can result in noise and abrasion are avoided.
  4. The differential pressures acting n the circuit control valves are reduced preventing faulty operation.

Operating Principle

The balancing valve is a hydraulic device that controls the flow rate of the heating/cooling transfer fluid. The control mechanism is a ball valve (1), operated by a control stem (2). The flow rate is manually and properly set by use of the convenient onboard flow meter (3) housed in a bypass circuit on the valve body. This circuit is automatically shut off during normal operation. The flow rate is indicated by a metal ball (4) sliding inside a transparent channel (5) with an integral graduated scale (6).


Construction Details





Specification Summaries

132 Series: Balancing valve with flow meter. Threaded connections 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″ NPT Female by Female. Brass body. Brass ball. Brass ball control stem, chrome plated. PTFE ball seal seat. PSU control stem guide. Brass flow meter body. Brass flow meter bypass valve stem, chrome plated. Stainless steel flow meter springs. PSU flow meter float and indicator cover. EPDM seals with pre-fromed shell insulation in expanded closed cell PE-X. Water and glycol solutions. Maximum percentage of glycol 50%. Maximum working pressure 150 psi (10 bar). Working temperature range 14-230 def °F (-10-110°C). Flow rate range unit of measurement gallons per minute (gmp). Accuaracy ± 10%. Control stem angel of rotation 90°.

We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice. Via: Caleffi North America, Inc.