Submitted by divya on April 29, 2025

DF400 Series Rotary Plug Control Valve

Dynaflo

1 to 6 inch NPS (25 to 150mm DN)
Flanged Body, Quarter Turn Operation
RF End Connection
ASME B16.34 Class 150 to 600 Pressure Rating
ANSI/FCI 70.2 and IEC 60534-4 Class IV / VI Shutoff

The Model DF400 is a heavy-duty eccentric plug control valve (sometimes referred to as a rotary globe valve) combined with a powerful spring-and-diaphragm actuator. This valve-actuator combo is used in all kinds of demanding applications, including oil and gas production, chemical process industries and severe service environments.

The self-aligning eccentric plug design and straight through flow pattern of the DF400 control valve provides tight shutoff while also allowing for higher flow capacities than other valves. The exclusive low-profile actuator provides reduced deadband and hysteresis through a combination of low-friction design with a robust splined shaft connection.

Overview

Options

Standard low-emission packing
Blowout proof shafts
Reduced port trim options available
NACE construction available
High temperature and sever service external coatings available

Product Specifications

DF400 Specifications

DF400 Available Configurations

AVAILABLE CONFIGURATIONS
VALVE SIZE	END CONNECTION			ACTUATOR SIZE (DIAMETER)	STROKE	OPERATING RANGE
	RF (FLANGED CONNECTION)
	ASME CLASS 150	ASME CLASS 300	ASME CLASS 600
1" NPS (25mm DN)	ü	ü	ü	4-1/2" (114mm)	3-1/2" (89mm)	7-15 PSI (0.48-1.03 BAR)
2" NPS (50mm DN)	ü	ü	ü	4-1/2" (114mm)	3-1/2" (89mm)
3" NPS (80mm DN)	ü	ü	ü	6" (152mm)	5-3/4" (146mm)
4" NPS (100mm DN)	ü	ü	ü	6" (152mm)	5-3/4" (146mm)
6" NPS (150mm DN)	ü	ü	ü	7" (178mm)	7-1/4" (184mm)	7-24 PSI (0.48-1.65 BAR)

DF400 Available Shutoff Classifications

AVAILABLE SHUTOFF CLASSIFICATION
VAVLE SIZE	BODY MATERIAL	SEAT MATERIAL	TEMPERATURE RANGE				SHUT OFF CLASS
			MINIMUM		MAXIMUM
			°F	°C	°F	°C
ALL SIZES	WCC	METAL(1)	-20	-29	750	400	CLASS IV
		PTFE SOFT SEAT(1)	-20	-29	450	232	CLASS VI
	CF3M	METAL(1)	-250	-157	750	400	CLASS IV
		PTFE SOFT SEAT(1)	-50	-46	450	232	CLASS VI
NOTES:	(1) Temperature limitations for valves with Slurry Seal option may be determined by the Seal Bushing O-Ring.