Rubber check valves are a better and cheaper way to control back pressure in sewage treatment plants, drains, and tidal operations. They are completely passive flow devices that can operate without maintenance or external power supply, or manual assistance.
These valves can directly replace low-efficiency, high-maintenance check valves, and their rubber flaps tend to stick, rust, and get stuck in bad positions. Connect the open revolving door from seawater to freshwater ponds and catchments to many other water-based applications.
Our history of manufacturing rubber hoses can be traced back to the 1930s, when there was a need to solve backflow or piping problems. The rubber check valve can be provided with a flange, sleeve, or jacket.
Advantages of rubber check valves: All rubber structures are resistant to abrasion and mud. Work quickly, without a water hammer. The unique design prevents backflow. Maintenance and energy costs are low. Do not deform or freeze.
Quickly replace any hinged cover check valve. Available in sizes 1 to 96. We can offer a different inter diameter for a concrete pipe.
Frequently Asked Questions Rubber Check Valve
Should the rubber check valve be installed in a specific location? Yes, the rubber flap must be installed vertically, and the bill must be installed vertically. If necessary, it can be rotated 30 degrees to save space below.
How far can the rubber check valve be installed? Since the valve is independent of hinges, sleeves, or weight, the rubber check valve can be installed at any angle from vertical to horizontal.
What is “back pressure”? When the rubber check valve is immersed in liquid, it will be exposed to external pressure. Therefore, the maximum immersion depth of the valve must be specified, as this is considered the maximum backpressure that the valve can withstand.
What is the opening pressure to open the valve? Water 1 to 2 inches above the backpressure is usually drained from the pipe.
How much back pressure can the rubber check valve withstand? The backpressure directly depends on the valve size; for the smallest diameter, backpressure of up to 200 psi is acceptable. For larger diameters, the backpressure limit is approximately 12 psi. Each rubber check valve is precisely manufactured according to the line pressure, back pressure, and flow rate you need. We can even provide valves up to 650 psi—inches with internal back pressure fasteners.
What are the most common settings? The flanged rubber check valve is directly screwed on the distributor wall to replace the existing damper; the 730 rubber check valve is directly connected to the flange assembly or directly to the existing pipeline.
Can I use rubber check valves in my drinking water system? Rubber valves can provide ANSI/NSF-61 certified elastomers. Due to the high demand for clean water and drinking water, the problems usually associated with the scaling or leaching of elastomers in drinking water systems are solved.
Can rubber check valves be installed on non-circular pipes? Estimate the size at 4 different angles to get the size you want.
Will rivers and waves damage the valve? In most cases, rivers and waves will not damage the rubber check valve. but if there is a problematic water flow or abnormal waves, it is recommended to use sidewalls or stone piers.
Can rubber check valves be used as pressure relief valves? No, the rubber valve is designed to provide an excellent backflow preventer and should not be considered a pressure relief valve.
Can we do a special custom design? In most cases, rubber check valves can be used for multiple purposes.
What types of elastomers are there? The rubber check valve is manufactured and supplied so that it can withstand almost any medium. (NSF / ANSI standard 61 certifications), chloroprene rubber, chewing gum, chlorobutyl rubber, and EPDM rubber.
What materials can be used for support rings and belt clips? Rubber check valve comes standard with 316 stainless steel support ring and 304 stainless steel clamp.
Other materials can be provided on request. With special flange or drilling? Yes, the standard hole pattern is ANSI 125/150# other drilling standards such as ANSI 250/300 #, BS-10, DIN NP-10, and DIN NP-16, JIS-5k, and JIS-10K are available upon request.
Can I install rubber check valves nearby? Area? Yes, one of the unique features of the rubber cover is the design of the banknote area. When the mouth opens under the pressure of the head and allows liquid to flow, if no pressure is applied to the head, the mouth will close and prevent children or animals from crawling in. Since the rubber check valve is made entirely of rubber compounds, no strong knock is common with flap valves.
Can rubber check valves be used in winter? Yes, just like any other setting, rubber. In winter conditions or freezing temperatures, the valve will not become difficult. When installed in a tap water system, the valve will continue to work satisfactorily due to the unique chemical properties of the elastomer. Under abnormal conditions, the rubber valve will not freeze.
Does the rubber check valve work when covered with sand or sediment? Under normal circumstances, the drainage pipe will produce a small flow pattern corresponding to the flow rate of the medium. Keep the remaining sediment away from the valve opening. Again, this only applies to Dannenbaum LLC’s direct-injection design.
What is the maximum temperature that the rubber check valve can withstand? The temperature can vary from -65° to +400°, depending on the specified elastomer.
Is the rubber check valve suitable for direct sunlight and ultraviolet radiation? Yes, all rubber valves have a reinforced nitrile jacket. In some cases, the rubber check valve may be exposed to sludge, making nitrile an ideal choice for protection.