Netafim Series 80 3-Way Angle Valve 2 in, Pressure Sustaining (61PSTH2GH3AN)

Netafim 2 Inch Pressure Sustaining Valve for Pumps and Filters

A pressure reducing valve protects what sits downstream, and this valve protects everything upstream of it. It holds a minimum inlet pressure and opens only far enough to pass the flow the supply side can spare. The pilot on the bonnet watches inlet pressure and drives the main diaphragm. When the line climbs above the set point the valve opens, and when the supply sags it closes back to hold the line. It is fully hydraulic, item 71610-014631, model 61PSTH2GH3AN, with no solenoid to wire. The 2 in angle body carries 0.25 to 176 GPM and works between 7 and 150 psi, with water up to 140°F. Open, it adds very little loss, about 0.1 psi at 20 GPM and 7.0 psi at 170 GPM. Body, bonnet and seat are glass-reinforced polyamide, with 304 stainless fasteners and a 302 stainless spring. It measures about 3-1/2 x 6-1/2 x 6-13/16 in and weighs 1.8 lb. Pilot springs are colour coded by range: yellow 7-30 psi, green 14-65 psi and red 30-90 psi.

Where a Pressure Sustaining Angle Valve Earns Its Spot

Filter stations are the most common home for it, because a backflush needs pressure held behind the filters while zones keep drawing water. Pump protection is the second, since the valve stops a large, low zone from dragging the main down and running the pump off its curve. Sloping sites use it to share water fairly, so a downhill block cannot rob the blocks above it. This size suits headers that feed a full range or several blocks at once. Plumb it downstream of the equipment it protects, letting the angle body turn the flow off a riser or manifold. Bring the supply up slowly, then dial the pilot in against a gauge on the inlet side. Then leave the pilot to regulate. This pressure sustaining angle valve can sit upright or on its side, which helps in a cramped pump or filter manifold. Scheduling is a separate job, so pair it with an electric zone valve or a controller-driven master valve. Any change to pumps, filters or zone layout shifts the pressure it holds, so revisit the set point after each one.

Key Features

• Pressure sustaining pilot: Holds a minimum upstream pressure and passes only the surplus flow downstream.
• 0.25-176 GPM range: Covers a single block up to a full range header on one 2 in valve.
• Bonnet-mounted pilot: Pilot and controls sit on the bonnet, with no tubing connected to the valve body.
• Angle body: Turns the flow off a riser or manifold without an extra elbow.
• Colour-coded pilot springs: Yellow, green and red springs span set points from 7 to 90 psi.
• Fully hydraulic: No wiring or controller needed for the valve to regulate.
• Vertical or horizontal mounting: Sits upright or on its side to suit a tight pump or filter manifold.

Technical Specifications