Rain Bird PSI-M-30 pressure regulator with constant 2.1 bar outlet pressure

2.1 bar operating pressure for irrigation

The Rain Bird PSI-M-30 automatically reduces higher supply pressure to a defined outlet pressure of 2.1 bar (30 psi). The regulator is designed for irrigation systems where drippers, dripline or other components need to be supplied with controlled water pressure.

The outlet pressure is factory preset, so no manual pressure adjustment is required. Within its intended operating range, the PSI-M-30 compensates for changes in inlet pressure and flow to maintain a relatively constant downstream pressure.

Pressure control for drip and micro irrigation

Excessive supply pressure can adversely affect drippers, dripline, micro-sprays and connection components. Installing the PSI-M-30 upstream of the irrigation zone reduces the pressure and helps provide suitable operating conditions for downstream components.

Pressure reduction takes place centrally before the irrigation section being supplied. This provides a straightforward way of controlling pressure for an entire irrigation zone.

Factory preset for simple operation

A diaphragm inside the PSI-M-30 provides automatic mechanical pressure regulation. The design requires neither electrical power nor a connection to an irrigation controller. A durable stainless steel spring supports reliable regulator operation.

Because the outlet pressure is preset, there is no need for adjustment after installation. This is particularly useful when the irrigation system has already been designed to operate at approximately 2.1 bar.

Easy integration into irrigation systems

The pressure regulator has a ¾" female connection at both the inlet and outlet. It can therefore be integrated into the water supply of a drip or micro irrigation system using suitable threaded fittings.

The specified direction of flow must be observed during installation. Rain Bird allows the M Series to be installed in both above-ground and below-ground applications. The regulator should be positioned upstream of the components requiring reduced pressure.

Rain Bird M Series preset pressure control

The PSI-M-30 belongs to the Rain Bird M Series of regulators with different preset pressure levels. This allows the regulator to be selected according to the requirements of the irrigation system without the need for an adjustable pressure regulator.

With its 2.1 bar outlet pressure, the PSI-M-30 provides a higher preset pressure than the PSI-M-15, PSI-M-20 and PSI-M-25 models and is suitable for irrigation components requiring the corresponding operating pressure.

Technical data and specifications

• Manufacturer: Rain Bird
• Series: PSI-M
• Model: PSIM30
• Product type: Preset pressure regulator
• Outlet pressure: 2.1 bar
• Outlet pressure US: 30 psi
• Pressure setting: Factory preset
• Inlet connection: ¾" female thread
• Outlet connection: ¾" female thread
• Flow range: 0.5-2.27 m³/h
• Flow range: 8.3-37.8 l/min
• Operating principle: Diaphragm operated
• Spring: Stainless steel
• Housing: Engineering-grade plastic
• Installation: Above or below ground
• Application: Drip irrigation, micro irrigation and other irrigation applications requiring pressure reduction

Frequently asked questions about the Rain Bird PSI-M-30

What outlet pressure does the PSI-M-30 provide?

The regulator is factory preset to 30 psi, corresponding to a nominal outlet pressure of approximately 2.1 bar.

Does the pressure need to be adjusted after installation?

No. The PSI-M-30 has a fixed factory pressure setting, so no manual adjustment of the required outlet pressure is necessary.

Where should the pressure regulator be installed?

The PSI-M-30 should be installed upstream of the irrigation section that requires reduced pressure. The specified direction of water flow through the regulator must be observed.

Can the PSI-M-30 be installed below ground?

Yes. Rain Bird specifies the M Series for both above-ground and below-ground applications.

Is the PSI-M-30 the same as the PSI-M30X-075?

No. Although both models regulate pressure to 2.1 bar (30 psi), they are different products. The PSI-M30X-075 is a separate medium-flow inline pressure regulator.

Why use a preset pressure regulator?

A preset regulator eliminates the need to manually adjust the outlet pressure. When the downstream irrigation components are designed for the corresponding pressure range, it provides a simple solution for reducing supply pressure.