Our Standard Control Regulator comes in normally closed (Positive) or normally open (Negative). Our standard Control Regulator Valve comes in one body type:
Threaded – 1/4″ NPTF, BSPP or BSPT
The normally closed (NC, Positive Control) regulator is used to modulate the intake valve closed to control compressor output. The valve is installed so that it senses compressor output pressure. The NC regulator stays closed up to a pre-set pressure. Once the valve opens, a pressure signal is output to control the compressor.
Two types of valves are available:
• Proportional response with downstream bleed to set the gain
• Differential response with factory set gain and adjustable set point
The normally open (NO, Negative Control) regulator is used to modulate the intake valve (or others) open to control compressor output. The valve is installed so that it senses compressor output pressure. The NO regulator stays open to a pre-set pressure sending the compressor output pressure to the control system. Once the valve starts closing, the pressure signal that is sent out, is proportionally decreased compared to the compressor output pressure.
CR – Normally Closed (Positive)
The control regulator either normally open or closed has one basic body with
connection to the system available in three thread types ¼ NPTF, BSPP or
BSPT. The body and cap are aluminum, seal parts are stainless steel, and
internal parts are brass and steel. A viton diaphragm with a spring is used to
control opening or closing pressure of the valve.
Normally Closed Valve has the following standard Gains:
Gain Ratios: 1:1, 1.25:1, 2:1, 3:1, 3.8:1, 5:1, 6:1
Adjustment Standard: Knob or Slotted Screw
Set Opening Pressures: 50 to 200 psi (3.4 to 13.8 bar) by 20 psi (1.4 bar) increments
Mounting Option: none, Panel, Screw thread (1/4 inch, 6 mm)
The valve is rated for 250 psi (17.2 bar) maximum pressure and 250°F (121°C) maximum