Submitted by divya on July 14, 2025

DFRP Rotary Pneumatic Piston Actuator

20 PSIG (1.38 BARG) Minimum Cylinder Operating Pressure
1/2" (12.7mm) to 2-1/2" (63.5mm) Valve Shaft Compatibility
90 Degree Rotation
-40°F to 180°F (-40°C to 82°C) Standard Temperature Limitations

DFRP rotary double-acting pneumatic piston actuators are designed for high torque applications. When combined with a positioner or a two-position control signal, DFRP actuators can be used for throttling or on/off control. DFRP actuators will always require a volume tank in order to hold a fail position.

Overview

Options

Handwheels and Travel Stop Options Available
Versatile Instrument Mounting Options
Splined Connection
Unique Design Allows For Low-Cost Cylinder Replacement
Heavy Duty Protective Coatings Available

Product Specifications

DFRP Specifications

DFRP VALVE SHAFT COMPATIBILITY

AVAILABLE VAVLE SHAFT COMPATIBILITY
VALVE SHAFT CONNECTION SIZES		ACTUATOR SIZES
INCH	mm	028	079	113	113	154
3/4	19.1	ü	ü	ü	û	û
7/8	22.2	ü	ü	ü	û	û
1	25.4	ü	ü	ü	û	û
1-1/4	31.8	ü	ü	ü	û	û
1-1/2	38.1	ü	ü	ü	û	û
1-3/4	44.5	ü	ü	ü	ü	ü
2	50.8	ü	ü	ü	ü	ü
2-1/8	54	ü	ü	ü	ü	ü
2-1/2	63.5	û	û	û	ü	ü
4	101.6	û	û	û	ü	ü

DFRP OPERATING PRESSURE, PISTON AREA AND TORQUE

AVAILABLE DFRP OPERATING PRESSURE, PISTON AREA AND TORQUE
ACTUATOR SIZE	MAXIMUM OPERATING PRESSURE		PISTON AREA		0–90 DEGREE MAXIMUM TORQUE		TORQUE PER PSIG
ACTUATOR SIZE	PSIG	BARG	INCH²	cm²	lbf-in	N•m	lbf-in	N•m
028	110	7.58	28.27	182	7,104	9,626	87	5.31
079	100	6.89	78.54	507	13,800	18,710	175	19.77
112	85	5.86	113.1	730	16,896	22,913	199	22.48
113	110	7.58	113.1	730	56,004	75,926	373	42.14
154	110	7.58	153.94	993	65,004	88,128	433	48.92

DFRP CYLINDER DISPLACEMENT VOLUME

AVAILABLE DFRP CYLINDER DISPLACEMENT FOR 90 DEGREE ROTATION
ACTUATOR SIZE	ACTUATOR PISTON POSITION
	PISTON UP		PISTON DOWN
	INCH3	cm3	INCH3	cm3
028	125	2,048	131	2,147
079	361	5,916	369	6,047
112	517	8,472	564	9,242
113	942	15,437	997	16,338
154	1,290	21,139	1,361	22,303