Exploring the Many Benefits of Constant Pressure Pump Control Valves

Adequate and dependable water pressure is one of the simplest yet greatest luxuries of the modern-day household. Whether an individual is washing dishes, running a sprinkler system, getting the kids ready for the day, or finishing up a load of laundry, the benefits of consistent pressurized water are many. In fact, on average the American family uses over 300 gallons of water at home. Therefore, steady and reliable water pressure is an important feature for todays busy household plumbing system.

By Laura Jensen, Marketing & Communications Specialist – Flomatic Valves

What are Constant Pressure Pump Control Valves?

Constant pressure pump control valves are found in nearly every hydraulic sys­tem. These valves are specifically engi­neered to address flow regulation, stop rapid pump cycling, and ultimately pre­vent long-term hydraulic shock. What do constant pressure pump control valves do? Although they are best known for helping keep water constantly flowing at a constant pressure in a well system in conjunction with a pump and bladder tank, constant pressure pump control valves also offer:

  • Assistance with rapid pump cycling while also maintaining pre-set operating pressures,
  • Water hammer prevention and are practi­cally maintenance-free,
  • Clog resistance while also providing a longer pump life,
  • Electricity and energy cost savings,
  • Continued and extended pressure for older/existing pumps,
  • A simple design and construction,
  • Easier maintenance than a typical VFD system.
Flomatic constant pressure control valve with Cycle Gard technology. These models are designed with a self-cleaning slotted seat.
Flomatic’s NSF/ANSI 61 & 372 certified Cycle Gard® IV model CB152E reduces rapid pump cycling and maintains a pre-set operating pressure for pump systems.

How Constant Pressure Pump Control Valves Work

In a traditional water-well system, where the size of a pressure tank is required to correctly match the attached size of a pump. For example, a 10 GPM pump requires a 10 GPM drawdown on a tank and at least a one-minute runtime on the pump to cool it off. With a constant pres­sure pump control valve, tank and pump sizes are not required to match each other.

Typically, constant pressure pump con­trol valves are hydraulically operated — meaning electrical power is not required for functionality. The valves are generally installed in front of the pressure tank and set to a single automatic pressure setting instead of a pressure range. For example, if a constant pressure pump control valve is set at 50 PSI and used with a 40/60 switch, when the pressure in the tank falls to 40 PSI, the pump turns on to bring the pressure up to 50 PSI. When it reaches 50 PSI, the valve will close from 50 PSI to 60 PSI and the tank will be filled at a reduced rate due to a small amount of water con­tinuing to run through the valve even after its closing.

This is achieved in one of two ways de­pending on the style of the constant control pump valve in use. A valve may either contain an externally adjustable by­pass or a slotted seat disc, also known as a notched seat or leaky seat. Both varia­tions will allow water to pass through the valves even when it is fully closed; the big difference is, how much water.

Top-Notch Design and Strength from Within

Constant pressure pump control valves work using an internal cartridge that moves vertically within it depending on downstream pressure. It also moves ver­tically when the pressure reaches below the setpoint and closes when it reaches desired PSI. At the bottom of the car­tridge is a stainless-steel plate with a small notch cut out. It is through that opening that 1 GPM of water will con­tinue to flow — even when the valve is seated and closed. Ultimately maintain­ing durability, consistency, and efficiency throughout the water well system.

The advantages of a notched seat design stem from its simplicity. Established in the industry for years, a notched-seat design is common among constant pressure control valves. Constant pressure control valves featuring a slotted seat, will let a fixed volume of 1 GPM through the closed valve. Saving the homeowner energy and cost-related savings.

Flomatic’s Cycle Gard® model CI CIN10. These valves are ideal for irrigation, water well, and agriculture applications.

Where Else Are Constant Pressure Pump Control Valves Used?

Constant pressure pump control valves are best known in the well water industry, but their applications span far past industrial and household use. Ranging in use from pump booster systems to irrigation/sprin­kler systems and beyond, the benefits are endless for the following applications:

  • Residential areas or domestic well wa­ter systems;
  • Municipal systems or public water systems;
  • Apartments and subdivisions;
  • Schools, farms, and parks.
Laura Jensen is the Marketing and Communications Specialist at Flomatic Valves. She holds a Master’s degree from Marist College. She may be reached at ljensen@ flomatic.com or (518) 681-3972.
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Sara Mathov is a feature editor contributing to Fugitive Emissions Journal, Stainless steel World Americas, and other related print & online media.