PDF《with double safety valve systems.》

DKRCI.

PD.IE0.A6.02 | 520H0706 |

1 DSV

1 and DSV

2 are change-over valves, which are designed to meet all industrial refrigeration application requirements. DSV valves are designed specifically for use with double safety valve systems. 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, even with minimum torque the valve will close effectively. All valves are equipped with vented cap and nipple/flange connections, which permit easy inspection or replacement of safety valves. ? Applicable to HCFC, non flammable HFC, R717 (Ammonia) and R744 (CO2). ? Each valve type is clearly marked with type, size and performance range. ? The valves and caps are prepared for sealing, to prevent operation by unauthorised persons, using a seal wire. ? Can accept flow in both directions. ? Housing and bonnet are made from low temperature steel according to requirements of the Pressure Equipment Directive and other international classification authorities. ? Max. operating pressure: DSV

1 and DSV 2:

40 bar g (580 psi g) Features ? Temperature range: DSV

1 and DSV 2: -50/+100°C (-58/+212°F) ? DSV

1 when fitted with

2 x SFA 15/BSV

8 or DSV

2 when fitted with a combination of either

2 x SFA 15, or

2 x SFV 20, or

2 x SFV 25, meet the requirements according to EN13136 "Safety Valves Calculations" regarding max. 3% pressure drop in upstream line. ? Classification: DNV, CRN, BV, EAC etc. To get an updated list of certification on the products please contact your local Danfoss Sales Company. DKRCI.PD.IE0.A6.02 | 520H0706 |

2 DSV

1 valves DSV

2 valves Nominal bore DN ≤

25 mm (1 in.) DN32 mm (1? in.) Classified for Fluid group I Category Article 3, paragraph

3 II Pressure Equipment Directive (PED) DSV valves are approved and CE-marked in accordance with Pressure Equipment Directive - 97/23/EC. For further details / restrictions - see Installation Instruction. Refrigerants Applicable to HCFC, non flammable HFC, R717 (Ammonia) and R744 (CO2). Flammable hydrocarbons are not recommended. The valve is only recommended for use in closed circuits. For further information please contact Danfoss. Temperature range C50/+100°C (C58/+212°F). Pressure The valves are designed for: Max. operating pressure:

40 bar g?(580?psig) Capacity Type Kv-value Cv-value m3 /h Usgal/min DSV

1 17.5 20.3 DSV

2 30.0 34.8 Technical data Connections Available with the following connections: - Weld branch/nipples/flanges - DIN

2448 Note: DSV valves are supplied c/w DSV inlet connection fittings, DSV outlet connection fittings, and SFA/BSV/SFV outlet connection fittings. Please refer to ordering section. Housing and bonnet Made from special, cold resistant steel approved for low temperature operation. Valve cone A Teflon tightening ring provides perfect sealing with a minimum closing torque. Design Spindle Made of polished stainless steel, which is ideal for O-ring sealing. Packing gland The "full temperature range" packing gland ensures perfect tightness in the whole temperature range: C50/+100°C (C58/+212°F). The packing gland is equipped with a scraper ring to prevent penetration of dirt and other foreign bodies. Installation DSV are used as changeover valves between two SFA/BSV/SFV safety valves. When the spindle is turned clockwise (fig. 1) the inlet port C is connected to B. When the spindle is turned anticlockwise (fig. 1) the inlet port C is connected to A. For further information refer to installation instruction for DSV. Fig.