Specifications:
The NIBCO S1709 Circuit Balancing Valve features a dezincification-resistant brass body, bonnet, and trim, ensuring durability and longevity. It includes two integral test ports and a memory stop feature for ease of use. The valve is designed to meet ANSI B16.18 standards for solder ends and is suitable for HVAC and plumbing systems.

Applications:
This globe-style balancing valve is used to ensure a balanced system, providing a comfortable indoor climate and optimal flow distribution throughout the system. It enhances system performance, leading to energy and cost efficiencies.

Materials & Construction:
The valve is constructed with DZR metal for the body and stem, polymer for the handwheel, EPDM for stem seals, and brass for the stem retainer. It is fitted with two test points for differential pressure measurement and an integral memory stop.

Design Criteria:
The S1709 valve offers improved flow measurement accuracy and lower head loss compared to other valve styles. It is rated for 125 psi to 175°F, with a maximum of 250°F at 85 psi.

Unique Features:
The straight pattern globe design of the S1709 provides better flow measurement accuracy and lower head loss than "Y" pattern globes, ball, and plug style balancing valves.

Dezincification Resistance:
Dezincification, a form of corrosion, is effectively prevented in NIBCO valves due to the use of dezincification-resistant materials, ensuring the valve's mechanical strength and longevity.

Presetting Procedure:
The valve can be preset to a specific flow coefficient (Cv) value by aligning the required set position with the fixed stop, adjusting the memory stop, and refitting the handwheel retaining screw. This allows the valve to be closed and reopened to the preset position.