Danfoss SVA DH, SVA DL 250 – 300 Data sheet

Data Sheet

Shut-o valve

Type SVA DH and

SVA DL 250 – 300

Designed to meet all industrial refrigeration application requirements

SVA-DL and SVA-DH are angleway shut-off valves designed to meet all industrial refrigeration application requirements.

SVA-DL (Delta pressure Low)

is designed with a restriction in the opening function. High differential pressure can be applied from the side port and reduced pressure can be applied from bottom port. SVADL is a twostep valve for pressure relief.

SVA-DH (Delta pressure High)

is designed without restriction in the opening function. As a result of its balanced design this valve is able to open at

all differential pressures with limited torque. The angleway shut-off valves are carefully designed to give favourable flow conditions. Easy to dismantle for inspection and repair.

Both SVA-DL & SVA-DH shut-off valves have internal backseating enabling the spindle seal to be replaced with the valve still under pressure.

The valves are designed to give favourable flow characteristics and are easy to dismantle for servicing. The valve cone is designed to ensure perfect closing.

AI177086432445en-000801

Shut-o€ valves, Type SVA DH and SVA DL 250 – 300

Features

•Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2) and all flammable refrigerants

•Optional accessories:

◦Heavy duty industrial handwheel for frequent operation

◦Vented cap for infrequent operation

•Available in angleway version with extended bonnet for insulated systems

•The valve caps can be wire-sealed, to prevent operation by unauthorised persons

•Internal PTFE backseating

•The bonnet is suitable for installation in insulated low temperature applications

•The housing and bonnet are made from low temperature steel in accordance with the requirements of the Pressure Equipment Directive and other international classiƒcation authorities

•Classiƒcation: DNV, CRN, BV, EAC etc.

Portfolio overview

Figure 1: SVA-DL &

SVA-DH

Table 1: Portfolio overview

	Description	Features
	Valve body/connection material	Steel
	Equipment	Handwheel/Cap
		EN 10220
	Connection standard	ASME B 36.10M SCHEDULE 40/STD
		DIN 2448
	Connection type	Butt weld
	Max. temperature range	-60 °C – 150 °C (-76 °F – +302 °F)
		40 bar (580 psig) at -60 °C – +60 °C (-76 °F – +140 °F)
	Max. working pressure [bar/psig]	36 bar (522 psig) at +60 °C – +80 °C (+140 °F – +176 °F)
		32 bar (464 psig) at +80 °C – +120 °C (+176 °F – +248 °F)
		28 bar (406 psig) at +120 °C – +150 °C (+248 °F – +302 °F)
	Packing format	Single pack

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Shut-o€ valves, Type SVA DH and SVA DL 250 – 300

Functions

SVA-DL

The SVA-DL shut-off valve is designed with a restriction in the flow direction (differential pressure). To ensure the most favourable valve performance the flow must be directed from the side port towards the valve cone. Operation of the valve with flow in this direction is made possible by the two-step opening valve cone as illustrated below.

SVA-DH

The SVA-DH shut-off valve is designed without restrictions in either flow direction or differential pressure. Due to the balanced valve cone design the torque required to operate the valve is minimized and the valve can be opened and closed against high pressure with flow in any direction.

Pressure

Table 2: Pressure SVA-DL and SVA-DH

SVA-DL

SVA-DH

	∆Pmax= 40 bar	∆Pmax= 40 bar
	SVA 250: ∆Pmax= 9 bar	∆Pmax= 40 bar
	SVA 300: ∆Pmax= 6 bar
	Flow
	Table 3: Flow SVA-DL and SVA-DH
	SVA-DL	SVA-DH

NOTE:

Above pressures indicates the maximum pressures at which the the valve can be operated manually and tightness can be achieved.

© Danfoss | Climate Solutions | 2021.02

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Shut-o€ valves, Type SVA DH and SVA DL 250 – 300

Media

Refrigerants

Applicable to HC, HCFC, HFC, R717 (Ammonia) and R744 (CO2). For further information please see installation guide for SVA-DL and SVA-DH.

New refrigerants

Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.

When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for speciƒc refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.

Product speci‚cation

Pressure and temperature

Figure 2: Pressure and temperature graph

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<![endif]>Pressure [bar]

Temperature º[C]

Table 4: Pressure and temperature

	Temperature range	Max Working Pressure @ speci€c temperature range
		40 bar (580 psig) at -60 °C – +60 °C (-76 °F – +140 °F)
	-60 °C – +150 °C (-76 °F – +302 °F)	36 bar (522 psig) at +60	°C – +80 °C (+140 °F – +176 °F)
		32 bar (464 psig) at +80	°C – +120 °C (+176 °F – +248 °F)
		28 bar (406 psig) at +120 °C – +150 °C (+248 °F – +302 °F)

Design

Housing and bonnet

Made from special, cold-resistant steel approved for low temperature operations.

Bolts

Stainless steel, Quality A2-70.

Valve cone assembly

The valve cone assembly is turnable on the spindle, thus there is no friction between cone and seat when the valve is opened and closed. A Teflon tightening ring provides perfect sealing at a minimum closing torque.

Spindle

Made of polished stainless steel, ideal for O-ring sealing.

Packing gland

The packing gland comprises a spring loaded seal packing which ensures perfect tightness in the range: -60 °C – 150 °C (-76 °F – 302 °F). Furthermore, the packing glands incorporate a scraper ring to prevent the penetration of dirt and ice.

© Danfoss | Climate Solutions | 2021.02

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