Check valve (flap) ARCO 190205, 1" internal thread, rubber seat closure

ARCO check valve 190205 is a flap-type non-return valve with a 1" internal (female) threaded connection and a rubber seat closure. It is designed to allow flow in one direction and to prevent backflow in water and liquid circuits. The valve's simple flap mechanism and elastomer seat provide a compact solution for controlling reverse flow in domestic plumbing, pump discharge lines and circulation systems.

Advantages

The flap design ensures rapid response to flow changes and low head loss during normal operation. The rubber seat closure provides a tight seal against reverse flow and compensates for minor misalignments. The internal thread simplifies installation into threaded piping or fittings without additional adapters, and the valve's compact dimensions make it suitable for confined spaces.

Suitable for

• Domestic water supply and drainage systems
• Pump discharge lines to prevent backflow
• Circulation and recirculation loops in heating or cooling circuits
• General liquid piping where a one-way seal is required

Key specifications

• Type: flap (swing) non-return valve
• Connection: 1" internal (female) thread
• Sealing: rubber (elastomer) seat closure
• Media: water and compatible liquids
• Installation orientation: inline, flow direction dependent on flap hinge

How to use

Install the valve into a compatible 1" female-threaded port or pipe using appropriate thread sealant or tape on the male thread to ensure a leak-tight joint. Observe the flow direction indicated by the flap orientation so the valve opens toward the flow and closes against backflow. Ensure the valve is accessible for inspection and free from debris that could prevent the flap from sealing properly. Avoid exposing the rubber seat to aggressive chemicals or temperatures outside the valve's material limits.

Usage recommendations

Check the valve periodically for wear, deposits or seal deterioration and replace if the rubber seat shows signs of hardening or damage. When used with pumps, install the valve close to the discharge to minimise water hammer and to protect upstream equipment; confirm compatibility of the valve's rubber seat with the specific liquid in the system.