About Series PAMX-FSO Air-Actuated Valves

These are bi-directional air-actuated valves. The liquid flow can go from port 1 to 2 and from port 2-1. These valves are anti-waterhammer capable when the water flow goes from port 2 to port 1. The air-actuated valves in this series are available from ½" to 2" NPT in 316 stainless steel.

Technical Specifications

Media Temperature: 14-360°F

Ambient Temperature: 14-140°F

Body Material: Stainless steel AISI 316L

Seal Material: PTFE

Pilot Media: Air, Inert Gases, Water

Optical Position Indicator: Standard

Anti-Waterhammer Design: With 2→1 Flow

Additional Information

Flow Type: Normally Closed

Flow Direction: Bi-Directional (1→2/2→1)

Medium Examples: Water, Oil, Air, Steam, Aggressive Media^*

*Working pressure with steam is 150 psi maximum

Note: Actuator housing 360° rotation.

Available Valve Models

To view valve dimensions, select any model number below.

Model #	NPT	Orifice	Flow Rate (CV)	Operating Pressure (PSI)		Flow Direction	Pilot Pressure (PSI)		Actuator Diameter
				Min	Max	Over/Under Seat	Min	Max
PAMX 15 FSO	½"	½"	4.8	0	230/230	1→2/2→1	55	150	2 ½"
PAMX 20 FSO	¾"	¾"	9.0	0	230/230	1→2/2→1	55	150	2 ½"
PAMX 25 FSO	1"	1"	21.4	0	230/160	1→2/2→1	55	150	2 ½"
PAMX 32 FSO	1 ¼"	1 ¼"	31.0	0	230/85	1→2/2→1	55	150	2 ½"
PAMX 40 FSO	1 ½"	1 ½"	48.3	0	175/60	1→2/2→1	55	150	2 ½"
PAMX 50 FSO	2"	2"	59.3	0	115/35	1→2/2→1	55	150	2 ½"
PAMX 25-90 FSO	1"	1"	21.4	0	230/200	1→2/2→1	48	115	3 ½"
PAMX 32-90 FSO	1 ¼"	1 ¼"	31.0	0	230/175	1→2/2→1	48	115	3 ½"
PAMX 40-90 FSO	1 ½"	1 ½"	48.3	0	230/115	1→2/2→1	48	115	3 ½"
PAMX 50-90 FSO	2"	2"	59.3	0	230/72	1→2/2→1	48	115	3 ½"

About Series PAMX-FSO Air-Actuated Valves

Available Valve Models

Series Pressure Chart