Wednesday, February 16, 2011

Pressure Regulators | by Jerry Gerdes

Pressure Drop
Senninger® Pressure Drop
Pressure Regulator
Valley Pressure Regulator
Pressure Regulator
Nelson® Pressure Regulator

Pressure regulators are commonly used in sprinkler package designs. The regulator is installed just upstream of the sprinkler and its function is to maintain a constant water pressure into the sprinkler. The pipeline pressure within a center pivot or linear machine can vary for a number of reasons; friction loss, elevation changes within the field, sprinkler valves turning on and off on a corner span, or an end gun sprinkler turning on and off.

Pressure regulators are recommended for center pivot or linear machines where pressure fluctuations will cause a 10% or greater change in sprinkler flow. Using pressure regulators will maintain a uniform depth of water applied throughout the field. Sprinkler life and performance will also be maximized by selecting a regulator that will operate the sprinkler within its specified pressure range.

Regulators are available in pre-set pressure ratings. The most common ratings are 6, 10, 15, 20, 25, and 30 PSI. Maximum flow capacity for a pressure regulator will range from 15 to 20 GPM, depending on the regulator model. Pressure regulators require a minimum inlet pressure of 5 PSI plus the nominal pressure to produce the correct outlet pressure.

For more information, contact your local Valley Dealer.