Watts Series 9D Backflow Preventer 1/2" (0061935)

Description

Watts Series 9D Backflow Preventer 1/2" (0061935)

Watts 9D 1/2" is specially made for smaller supply lines and ideally suited for laboratory equipment, processing tanks, sterilizers, dairy equipment and similar applications. It is particularly recommended for boiler feed lines to prevent backflow when supply pressure falls below system pressure. Watts 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is bronze body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1/2" (15mm) and 3/4" (20mm). Drain is 1/2" (13mm) thread connection. True line-sized construction allows the check modules to open further allowing dirt and debris to pass more freely reducing check fouling. Stainless steel internal parts. Maximum flow at low pressure drop. Furnished with union connections to facilitate removal and replacement for maintenance. Compact for economy combined with performance. Design simplicity for easy maintenance and can be installed vertically or horizontally. Suitable for working supply pressures up to 175 psi (12 bars) and emergency backflow temperatures up to 250°F (121°C). Minimum pressure required 25 psi (172 kPa).

• 1/2" NPT connection with union inlet and outlet
• 1/2" NPT drain connection

Details and Features

• Manufacturer and Model: Watts 9D
• Oversize: No

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