Danfoss RA 2000 1PS Data sheet

Data sheet	RA 2000 1PS
	Thermostatic Radiator Valve
	For Use on One-Pipe Low-Pressure
	Steam Systems

Typical

Installation:

Dial / Operator / Sensor + Valve

FREE STANDING RADIATORS

The free-standing one-pipe low-pressure steam radiator is positioned where air continually passes freely over the operator

Use standard or tamper resistant model with combined dial/

operator/sensor. Always install Use air vent

the operator horizontally

PLUS

1/8” one-pipe steam valve

FREE STANDING RADIATORS

The free-standing one-pipe low-pressure steam radiator is accessible, but due to obstruction air cannot continually pass freely over the operator

CONVECTORS

Use dial / operator with remote sensor. The sensor and capillary tube may be extended up to 6’ and can be easily wall mounted.

Use air vent

PLUS

1/8” one-pipe steam valve

The one-pipe low-pressure steam convector is inaccessible; room air cannot continually pass freely over the sensing element

Use operator with combined
remote dial / sensor. The dial/
sensor and capillary tube may be		Use air vent
extended up to 6’ and are wall
		PLUS
mounted.
		Two 45° elbows
		PLUS
		1/8” one-pipe
		steam valve

ENCLOSED RADIATORS

The cabinet enclosed radiator configuration requires that the dial and sensor be mounted separately, away from the valve

Use operator with separate remote dial and remote sensor. Place the remote sensor on a draft-free wall. The remote dial mounts on the enclosure or wall.

Use air vent

PLUS

1/8” one-pipe steam valve

VDSXA222 © Danfoss 06/16

1

Data sheet	RA 2000 1PS
	Thermostatic Radiator Valve
	For Use on One-Pipe Low-Pressure
	Steam Systems

Design & Function:
			Part	Material
			1. Valve	Nicel plated brass
			2. Valve disc	EPDM
			3. Spindle guide	Phosphor bronze
			4. Spring	Stainless Steel
			5. Back seat washer	EPDM
			6. Valve Spindle	Brass
			7. Pressure pin	Stainless steel
			8. Clamping band	Al. alloy
			9. Allenscrew	Steel
			10. Socket	Zytel Nylon
			11. Bellows	Phosphor bronze
			12. Handle	ABS
			13. Adjustment spring	Steel
			14. Safety spring	Steel
			15. Pressure spindle	Polymide No. 6
			16. Air vent	-
			17. Retainer	Brass
			18. Packing gland	-
			19. Capillary Tube	Steel

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Danfoss’ RA 2000 1PS one-pipe steam thermostatic radiator valve provides accurate temperature control and quite operation.

The movement of air across the thermostatic operator effects the modulation control in regulating the venting of air from the radiator or convector.

Based on the set temperature on the operator, the 1PS regulates the amount of steam allowed into the emitter by controlling the amount of air allowed to vent out.

The venting action occurs during each system (boiler) on-cycle only when heat

•

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is required. Air will re-enter the system during the boiler off-cycle via a patened “across the seat” vacuum breaker. This eliminates condensate buildup and allows natural system aspiration to take place. The RA 2000 1PS assembly is specifically designed for low pressure steam systems. The system pressure should not be constant preventing air to get back into the system.

Thermostatic radiator valve assemblyvalve, thermostatic operator and air ventcan be used for free standing radiators, convectors, and enclosed radiators. 1PS is not recommended for copper fin tube radiators.

Dimensions:

7/32”1

--1/32 2 ”

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				-1/8”5/32-3

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			<![if ! IE]> <![endif]>NPT1/8”
			1/8” NPT
3-7/16”	3-7/16”
			3-3/16”
			13/3211/32”
			127/32”-1/4”
			5-3/16”

2	VDSXA222 © Danfoss 06/16