The gate valve is the most widely used ON/OFF valve for large diameter, full port applications. When the valve is fully open, it allows straight-through passage through and opening that is essentially the same size as the inside diameter of the connecting pipe. This is why there is little pressure drop through an Asahi/America gate valve. The valve operates when the hand wheel and stem screw (or electric actuator) move a cylindrical plug, the gate, up and down at right angles to the fluid flow. Traditionally, gate valves have been used only for ON/OFF service, but because the unique Asahi/America sliding plug design provides a larger seating area than conventional gate valves, it can be used for throttling. This significantly larger seating area, which runs 360 degrees around the cylindrical plug, has also virtually eliminated the valve chatter normally associated with gate valves. Asahi/America gate valves feature a solid polypropylene plug with a non-rising stem design.
Resources
Specifications
Motor Type:
Reversing, single phase
Torque:
400 in/lbs
Max Ambient Temp:
150˚F
Model:
S92 for sizes 1-1/2″ – 3″
Voltage:
120 VAC, 50/60 Hz
Switches:
Two single pole, double throw (15 Amp rating)
- Brushless, capacitor-run motors
- Integral thermal overload protection with auto reset
- Permanently lubricated gear train
- Combination Type 4X, 7 and 9 enclosure with thermally bonded powder coating/304 stainless steel trim
- ISO bolt circle
- Two 1/2″ NPT conduit ports prevent interference between control and power signals
- Declutchable manual override
- Highly visible position indicator
- Three-layer rotary switch for dry contact indication
- Series 92
- Extra limit switches
- Feedback potentiometer
- Heater and thermostat (to -40ºF)
- Positioner: 4–20mA or 0–10 VDC input signal
- 4–20mA output position transmitter