NR-040 | Check Valve with Removable Cover for Industry
Description
The NR-040 series Swing-Type Check Valve allows for one-directional flow and prevents the return flow of the liquid to its source.
The check valve is designed with a removable top cover which allows for cleaning and maintenance of the check valve without the need to remove it from the pipeline.
The disc is attached to the check valve body with the aid of an arm.
The check valve seals with the closure of the disc against the sealing ring which is located at the opening of the check valve body.
Main Features
- Maximum working temperature: 60° C.
- Maximum intermittent temperature: 90° C.
Note: For applications requiring a working temperature above the maximum stated or below 50 C., please consult first with the A.R.I. Applications Engineering Dept.
- Surge-resistant cast iron body.
- Corrosion-resistant inner parts ensure long term service under adverse conditions.
- Removable top cover allows for easy cleaning, maintenance, and seat replacement and eliminates the need to remove the valve from the system.
- Installed can be either in a horizontal or vertical position (vertically, only when the flow rate is in an upward direction and a counterweight is installed).
- Stainless steel extended shaft on both sides of the valve body.
Valve Selection
- Size range 3"- 40"
- Available in pressure ratings of 16 bar.
- Flanges are available in BS/ISO/ANSI standards.
- Can be adapted to various types of liquid upon request.
Options:
- Additional counterweight for slam protection and/or NR-040 LS electric limit switch indicator for transmitting a flow/no flow signal.
- Hydraulic Controlled Check Valve NR-040-HC is available.
- External Dampening Mechanism NR- 040 ED is a shock absorber based mechanism designed for restraining the mechanical impact of the check valve disc caused by rapid closure. It slows down the movement of the disc just prior to closure, preventing banging and the formation of a local surge. The shock absorber lessens the dynamic stress (torque) on the disc rod assembly and on the bearings. The shock absorber is fully adjustable. The Dampening Mechanism is available in two sizes: for NR-040 Check Valves 3” -6” and for NR-040 Check Valves 8” -12”
Note
For best suitability, it is recommended to send the fluid chemical properties along with the valve request.
Upon ordering, please specify: model, size, working pressure, thread and flange standard and type of liquid.