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Pilot Operated

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Pilot-Operated Solenoid Valves
1/4" to 3" FNPT or BSPT
5 to 6,000 psig
-420°F to +500°F
 
Atkomatic offers Pilot-Piston Operated valves in a wide range of sizes, materials and pressure ratings as shown in the chart below. The solenoid on the normally-closed Pilot-Piston valve only opens a small pilot orifice in the piston, this unbalances the pressure within the valve allowing the line pressure differential to lift the piston and therefore open the main valve seat. A minimum 5 psi differential pressure must be maintained to open the valve and keep it open.

When the solenoid is de-energized, the plunger assembly drops onto the pilot seat, allowing pressure to build up above the piston. This, assisted by the pilot spring, closes the valve.

Some applications for the Pilot-Operated Valves include:

bulletFill line for cooking tubs
bulletCommercial washing machines
bulletSteam cleaning equipment
bulletHigh-pressure car wash equipment
bulletWater cleaning of hot metal
bulletMain line, high flow process systems
NOTE: These valves must be mounted in a horizontal pipeline with the solenoid coil on top.
 

Maximum Pressure Differential (PSID)
Air/Gases Liquids Steam Light Oil
Series Construct. Material Pipe Sizes AC DC AC DC AC DC AC DC

JJ (2)

("Shorty")

 Globe Bronze 1/4"-2" 250 150 150 100     75 50

HS (2)

("Hotshot")

 Globe Bronze 1/4"-1-1/2"         125 125    
500 Globe Bronze 1/4"-1-1/2" 300 300 300 300 125 125 300 300
4000 Globe Bronze 1/4"-1-1/2" 500 500 500 500 200 200 500 300
5000 Globe Bronze 2"-3" 500 500 500 500 200 200 500 300
6000 Globe Bronze 1/4"-1/2" 1500 1500 1500 1000 200 200 1200 600
6000 Globe Bronze 3/4"-1-1/2" 1000 1000 1000 1000 200 200 1000 600
7000 * (2) Angle 316SS 1/4"-1/2" 6000 4000 6000 2500 300 300 6000 2500
8000 * (1) Globe 316SS 1/4"-1-1/2" 4000 4000 4000 3500 300 300 4000 2500
8000 * (1) Globe 316SS 2" 1500 1500 1500 1000 200 200 1500 500
12,000 (2) Globe Bronze 1/4"-1" 3000 3000 3000 3000 200 200 3000 3000
35,000 * Globe 316SS 1/2"-1" 2000 2000 2000 2000        
Fast Acting External Pilot   1-1/4"-2" 1500 1500 1500 1500        

Notes:

* Indicates valve always has a Class H Coil as a standard feature. Series 7000, 8000 and 35000.
(1) These valve series require a double-wound coil and Type "R" Relay for pressures above 1,500 psi. Consult Factory.
(2) Normally-Closed ONLY.

Maximum Pressure Differentials are for normally-closed valves only. Consult the full catalog, local distributor or factory for normally-open valves.

JJ ("Shorty") Series
(2 pgs./110KB)
HS ("Hotshot") Series
(2 pgs./112KB)
500-Series
(4 pgs./124KB)
4000- & 5000-Series
(4 pgs./341KB)
6000-Series
(4 pgs./197KB)
7000-Series
(2 pgs./128KB)
8000-Series
(4 pgs./203KB)
12000-Series
(4 pgs./138KB)
35000-Series
(3 pgs./134KB)
 
 

Teflon® and Tefzel® are registered trademarks of Dupont. Viton® and Kalrez® are registered trademarks of Dupont Dow Elastomers.

This page last updated: Wednesday, January 28, 2004
© Copyright 1998-2004 Fluid Process Control Corporation.
Information in this document is subject to change without notice.
Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders.