Submitted by divya on July 2, 2025

DF234 Integral Valve & Actuator

Compact dump valve for tough fluid applications that require easy serviceability.

1 to 2 inch NPS (25 to 50mm DN) Valve
1/4 to 1 inch (6.4 to 25.4mm) Port
Globe and Angle Body Styles
RF | RTJ | FNPT Available End Connections
ASME B16.34 Class 150 to 1500 Pressure Rating
ANSI/FCI 70.2 Class IV Shutoff

DF234 integral control valves are primarily designed for on/off control of fluids or gasses and may also be adapted for throttle control. These tough, compact valves feature a low-profile, lightweight design that fits into tight locations and makes for easy handling. The DF234 is well suited for high pressure fluid or gas applications up to 2,250 PSIG (155 Bar).

Overview

Standard live-loaded packing
Hammer nut bonnets
Field-reversible actuator
NACE construction standard

Reduced Port, Anti-Cavitation and Low-Noise Trim Available
Metal Seating Standard - Soft Seats Available
Live Loaded Packing Available
NACE Options Available
Cryogenic Options Available

Product Specifications

DF234 Valve Specifications

DF234 Available Configurations

AVAILABLE CONFIGURATIONS
BODY	SIZE	END CONNECTION
		FNPT	RF (FLANGED CONNECTION)					RTJ (FLANGED CONNECTION)
		FNPT	ASME CLASS 150	ASME CLASS 300	ASME CLASS 600	ASME CLASS 900	ASME CLASS 900/1500	ASME CLASS 600	ASME CLASS 900	ASME CLASS 900/1500
GLOBE	1" NPS (25mm DN)	ü	ü	ü	ü	ü	û	ü	ü	û
GLOBE	2" NPS (50mm DN)	ü	ü	ü	ü	û	ü	ü	û	ü
	NOTES:	FNPT = 2,250 PSI (155 BAR) COLD WORKING PRESSURE.

DF234 Available Shutoff Pressure Drops

AVAILABLE SHUTOFF PRESSURE DROPS
ACTUATOR ACTION	FLOW DIRECTION (PRESSURE TENDS TO)	PORT DIAMETER	NUMBER OF ACTUATOR SPRINGS
			0-20 PSIG (0-1.38 BARG) OPERATING PRESSURE		0-35 PSIG (0-2.41 BARG) OPERATING PRESSURE
			3	6	3	6
FAIL CLOSED	FLOW UP (OPENS VALVE)	1/4" (6.4mm)	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)
		3/8" (9.5mm)	1,672 PSI (116 BAR)	2,250 PSI (155 BAR)	1,672 PSI (115 BAR)	2,250 PSI (155 BAR)
		1/2" (12.7mm)	770 PSI (53.1 BAR)	1,867 PSI (129 BAR)	770 PSI (53.1 BAR)	1,867 PSI (129 BAR)
		3/4" (19.1mm)	valve will not shut off	684 PSI (47.2 BAR)	valve will not shut off	684 PSI (47.2 BAR)
		1" (25.4mm)	valve will not shut off	290 PSI (20.0 BAR)	valve will not shut off	290 PSI (20.0 BAR)
	FLOW DOWN (CLOSES VALVE)	1/4" (6.4mm)	1,469 PSI (101 BAR)	2,250 PSI (155 BAR)	1,469 PSI (101 BAR)	2,250 PSI (155 BAR)
		3/8" (9.5mm)	2,139 PSI (147 BAR)	2,250 PSI (155 BAR)	2,139 PSI (148 BAR)	2,250 PSI (155 BAR)
		1/2" (12.7mm)	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)
		3/4" (19.1mm)	1,710 PSI (118 BAR)	942 PSI (65.0 BAR)	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)
		1" (25.4mm)	784 PSI (54.1 BAR)	392 PSI (27.0 BAR)	1,512 PSI (104 BAR)	1,064 PSI (73.4 BAR)
FAIL OPEN	FLOW UP (OPENS VALVE)	1/4" (6.4mm)	2,250 PSI (155 BAR)	valve will not shut off	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)
		3/8" (9.5mm)	2,250 PSI (155 BAR)	valve will not shut off	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)
		1/2" (12.7mm)	1,193 PSI (82.3 BAR)	valve will not shut off	2,250 PSI (155 BAR)	2,035 PSI (140 BAR)
		3/4" (19.1mm)	385 PSI (26.5 BAR)	valve will not shut off	1,507 PSI (104 BAR)	759 PSI (52.3 BAR)
		1" (25.4mm)	177 PSI (12.2 BAR)	valve will not shut off	807 PSI (55.6 BAR)	345 PSI (23.8 BAR)
	FLOW DOWN (CLOSES VALVE)	1/4" (6.4mm)	2,244 PSI (155 BAR)	valve will not shut off	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)
		3/8" (9.5mm)	2,250 PSI (155 BAR)	valve will not shut off	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)
		1/2" (12.7mm)	2,250 PSI (155 BAR)	valve will not shut off	2,250 PSI (155 BAR)	2,250 PSI (155 BAR)
		3/4" (19.1mm)	897 PSI (61.9 BAR)	valve will not shut off	897 PSI (61.9 BAR)	1,646 PSI (113 BAR)
		1" (25.4mm)	672 PSI (46.3 BAR)	valve will not shut off	672 PSI (46.3 BAR)	1,288 PSI (88.8 BAR)