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Semi Direct Lift

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Semi-Direct Lift Solenoid Valves
1/4" to 3" FNPT or BSPT
Zero to 3,000 psig
-420°F to +500°F
 
These valves are used where full-flow is needed, but where a 5 psi differential may not always be available. This type operates similarly to the piston-pilot type, except there is a mechanical linkage of the plunger and the piston assemblies. The solenoid can then lift and hold open the piston assembly, after the internal pressure has been unbalanced by the pilot opening. It will then hold the valve open with low or high flow (even to zero psi differential).

Some applications would be:

bulletPressurizing a tank to full source pressure
bulletProcess shutoff in a closed circulating system (especially where low flow and low system pressure is specified)
bulletLarge vacuum systems
bulletSuction line shutoff to a pump
bulletOther applications where a minimum 5 psi differential is not always available
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
15,400 Globe Bronze 1/4"-1-1/2" 300 300 300 300 125 125 300 300
15,800 Globe 316SS 1/4"-1" 1500 1500 1500 1000 200 200 1500 1000
31,400 Globe Bronze 1/4"-1/2" 1500 1500 1500 1000 200 200 1500 1000
(N.C.)     3/4"-1-1/2" 1000 1000 1000 1000 200 200 1000 1000
31,400 Globe Bronze 2"-3" 500 500 500 350 200 200 500 350
31,800 Globe 316SS 1/4"-1-1/2" * 3000 1500 3000 1000 300 300 3000 1000
(N.C.)     1-1/4"-2" ** 1500 1500 1500 1000 300 300 1500 1000
32,400 Globe Bronze 1/4"-1/2" 1500 1500 1500 1500 200 200 1500 1250
(N.O.)     3/4"-1-1/2" 1000 1000 1000 1000 200 200 1000 1000
32,800 Globe 316SS 1/4"-1" 3000 1500 3000 1000 300 300 3000 1000
(N.O.)     1-1/4"-1-1/2" 1500 1500 1500 1500 300 300 1500 1000
41,800 Globe 316SS 1/4"-1" 2500 1500 2500 1000 2000 800 2500 1000
42,800 Globe 316SS 1/4"-1" 2500 2000 2500 1500 2000 2000 2500 1500

Notes:

* Threaded cylinder cap, 31800-31860.

** Flanged cylinder cap, 31851-31871.

(N.C.) = Normally-Closed

(N.O.) = Normally-Open

(4 pgs./132KB)
(2 pgs./133KB)
(4 pgs./220KB)
(4 pgs./210KB)
(4 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.