Shut-off valve Type QDV
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- Edwina Sims
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1 Data sheet Shut-off valve Type QDV QDV is a shut-off valve, designed particularly for draining oil from systems containing refrigerant (ammonia) under pressure. The valve will close immediately on release of the handle, thus protecting user and environment against unne cessary refrigerant leaks. The valve should as a rule be installed as illustrated in fig. 1. In order to pre vent hydraulic pressure building up between the stop valve and the QDV an integral relief device is included as part of the cone arrangement, which will open at approx. 16 bar (232 psig). QDV is designed to meet the safety demands specified by national and international authorities within industrial refrigeration. Features Applicable to R717 (ammonia). Meets the safety demands within industrial refrigeration Handle can be positioned 360 Built-in integral relief device opening over 16 bar g (proventing hydraulic pressure building up between shut-off valve and QDV). Can be supplied together with a stop valve for quick on site mounting (fig. 1). Max. operating pressure: 40 bar g (580 psi g). Temperature range: 50/+150 C ( 58/+302 F). Classification: DNV, CRN, BV, EAC etc. To get an updated list of certification on the products please contact your local Danfoss Sales Company. Oil Fig. 1 QDV Danfoss DCS (MWA) DKRCI.PD.KL0.B H1199 1
2 Design Connections Available with the following connections: Inlet: Welding DIN (EN 10220) ½ in. FPT 3/4 in. FPT Outlet: G 3/4 in. pipe thread (ISO 228/1) ½ in. FPT 3/4 in. FPT Optional extras for outlet: Welding nipple DIN (EN 10220) Hose connection Other types of connection are available on request. QDV - SVA combinations Combinations of the QDV together with a dedicated SVA have been established for easy selection. Please study page 6 to find the code numbers for these combinations. Installation For further information refer to installation instruction for QDV. Technical data Refrigerants Applicable to R717 (ammonia). QDV is a backpressure dependent valve. If any tube or hose is mounted on the outlet of the QDV it has to be calculated to prevent blackpressure building up when relieving. For further information please see installation instruction for QDV. Flammable hydrocarbons are not recommended, for further information please contact your local Danfoss Sales Company. Temperature range 50/+150 C ( 58/+302 F). Pressure The valve is designed for: Maximum operating pressure of 40 bar g (580 psi g) Danfoss DCS (MWA) DKRCI.PD.KL0.B H1199 2
3 Material specification QDV 15 No. Part Material DIN/EN ASTM 1 Housing Steel G20Mn5QT EN LCC A352 2 Bonnet Steel St Spindle/Cone Stainless steel X10CrNiS Spring Steel 5 O-ring Cloroprene 6 O-ring Cloroprene S235JR EN S189 EN AISI 1015 AISI 303 Hose connection for outlet No. Part Material 12a O-rings Cloroprene (Neoprene) 12c Stub for hose - OD Ø15 mm Steel 12d Union nut - G 3/4" Steel Welding nipple connection for outlet No. Part Material 13a Al-packing Aluminium 13b Welding nipple - OD Ø21.3 mm Steel (S235JR) 13c Union nut - G 3/4" Steel Danfoss DCS (MWA) DKRCI.PD.KL0.B H1199 3
4 Connections ØD 1 ØD 3 ØD 4 ØD 5 QDV 15 DIN 15 mm in ØD 7 ØD 8 QDV 15 ½" FPT mm in ØD 7 ØD 8 QDV 15 3/4" FPT mm in ØD 1 ØD 3 ØD 8 QDV 15 DIN 15 mm in FPT 1/2" 13.5 T OD T kv-straight m 3 /h Cv-straight USgal/min OD SVA-ST DIN 15 mm in FPT 1/2" 13.5 T ID SVA-ST SOC ½ in. ID T L kv-straight m 3 /h mm in Cv-straight USgal/min L Danfoss DCS (MWA) DKRCI.PD.KL0.B H1199 4
5 Dimensions QDV 15 (stand alone) QDV 15 mounted on SVA valve Valve size A C max E QDV 15 mm in Ordering How to order The table below is used to identify the valve required. Type Inlet Outlet Code no. QDV 15 DN 15 DN 15 G 3/4 in. 148H3272 QDV 15 ½ in. FPT ½ in. FPT ½ in. FPT 148H3273 QDV 15 3 / 4 in. FPT 3/4 in. FPT 3/4 in. FPT 148H3274 QDV 15 DN 15 + SVA-ST DN 15 H-WHEEL* DN 15 G 3/4 in. 148H3310 QDV 15 ½ in. FPT + SVA-ST SOC ½ in. H-WHEEL* ½ in. SOC ½ in. FPT 148H3311 Fittings for hose connection - G 3/4" Fittings for welding connection - G 3/4" * Two valves are supplied in one box and should be mounted on site. The indicated inlet is for the stop valve - The indicated outlet is for the oil drain valve. 148H H3452 Important! Where products need to be certified according to specific certification societies or where higher pressures are required, the relevant information should be included at the time of order. Danfoss DCS (MWA) DKRCI.PD.KL0.B H1199 5
6 Danfoss DCS (MWA) DKRCI.PD.KL0.B H1199 6
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