Danfoss SVA DH, SVA DL 250

Data Sheet

Shut-oﬀ 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-o valves designed to meet all industrial refrigeration application requirements.

SVA-DL (Delta pressure Low)

is designed with a restriction in the opening function. High dierential 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 dierential pressures with limited torque. The angleway shut-o valves are carefully designed to give favourable ow conditions. Easy to dismantle for inspection and repair.

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

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

AI177086432445en-000801

Description

Features

Valve body/connection material

Steel

Equipment

Handwheel/Cap

Connection standard

EN 10220 ASME B 36.10M SCHEDULE 40/STD DIN 2448

Connection type

Butt weld

Max. temperature range

-60 °C – 150 °C (-76 °F – +302 °F)

Max. working pressure [bar/psig]

40 bar (580 psig) at -60 °C – +60 °C (-76 °F – +140 °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)

Packing format

Single pack

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

Features

• Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2) and all ammable 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 classication authorities

• Classication: DNV, CRN, BV, EAC etc.

Portfolio overview

Figure 1: SVA-DL & SVA-DH

Table 1: Portfolio overview

SVA-DL

SVA-DH

SVA 250: ∆Pmax= 9 bar SVA 300: ∆Pmax= 6 bar

∆Pmax= 40 bar

SVA-DL

SVA-DH

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

Functions

SVA-DL

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

SVA-DH

The SVA-DH shut-o valve is designed without restrictions in either ow direction or dierential 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 ow in any direction.

Pressure

Table 2: Pressure SVA-DL and SVA-DH

Flow

Table 3: Flow SVA-DL and SVA-DH



NOTE:

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

Pressure [bar]

Temperature [ºC]

Temperature range

Max Working Pressure @ specic temperature range

-60 °C – +150 °C (-76 °F – +302 °F)

40 bar (580 psig) at -60 °C – +60 °C (-76 °F – +140 °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)

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 specic 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

Table 4: Pressure and temperature

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 Teon 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 SVA DH, SVA DL 250 – 300 Data sheet