Both maintain a constant outlet pressure when handling rated flows. The difference comes when there is no flow through the device. The standard pressure regulator will read the same pressure in and out when there is no flow. The limiting valve has a rubber seat and therefore is able to limit the downstream pressure to about 10-15 psi above the rated outlet pressure, even with no flow conditions. This helps assure optimum system performance and protects downstream components. Both operate with very low hysteresis, though the limiting valve has slightly more friction loss at the same flows.
A pressure regulator MUST be installed downstream from all shut-off valves.
A pressure regulating limit valve, with its different internal construction, CAN BE installed upstream of shut-off valves. With either device, use of a filter upstream is recommended (100 mesh or finer capable of flowing up to 18 gpm with no more than 5 psi internal friction loss).
The pressure regulating limit valve is intended for outdoors use only.
Both Senninger pressure regulators and pressure regulating limit valves are 100% water-tested before they leave the factory. Senninger pressure regulators are warranted for two years on materials, workmanship and performance. Senninger pressure regulating limit valves are warranted for one year.
For more information about Senninger pressure regulators or pressure regulating limit valves, contact them at info@senninger.com or visit www.senninger.com
“He comprado i-Wobs desde 1998 y todavía siguen funcionando perfectamente en mis terrenos y suelos. He visto i-Wobs instalados en numerosos pivotes por toda la zona centro-sur de Idaho. Simplemente siguen funcionando todo el tiempo.”
