Nozzle Check Valves. NOREVA nozzle check valves are used
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3 Nozzle Check Valves NOREVA nozzle check valves are used in applications where the reverse flow of a fluid has to be avoided. These valves are suitable for all kind of liquid and gaseous fluids and fire safe by design. The high economic efficiency of our nozzle check valves is a result of very low pressure losses and the maintenance-free design. Due to short strokes and low moving masses the valves can close slam-free within fractions of seconds. Typical applications are for example: oilpipelines, steel mills, chemical plants, water works, pumping stations,water distribution plants, power plants, compressor stations, etc. Competence, best possible customer service and flexibility are the basis of our success. To us quality means fulfilling our customers requests. Judge us on this! NRV-Z 250 PN 100 (10 ANSI 600) Natural Gas Storage NRV-Z 250 PN 10 (10 ANSI 125) and NRV-G 400 PN 10 (16 ANSI 125) Water Pumping Station NRV-B 300 PN 100 (12 ANSI 600) Natural Gas Storage NRV-R 1000 PN 25 (40 ANSI 150) Sea Water Pumping Station 1
4 Production To guarantee the high quality level of our nozzle check valves, all main production steps will be executed at our workshop: Incoming Inspection - Final Machining - Pressure Testing - Corrosion Protection - Assembly - Final Inspection - Packing - Despatch 2
5 Manufacturing Program NRV-ZK DN 25 (1 ) to DN 300 (12 ) Up to PN 400 (ANSI 2500) Flanged ends or Welding ends NRV-ZSK DN 25 (1 ) to DN 300 (12 ) Up to PN 400 (ANSI 2500) Wafer type NRV-B DN 300 (12 ) to DN 2200 (88 ) Up to PN 400 (ANSI 2500) Flanged ends or Welding ends NRV-BK DN 300 (12 ) to DN 2200 (88 ) Up to PN 400 (ANSI 2500) Flanged, Welding ends or Wafer type NRV-Z DN 25 (1 ) to DN 250 (10 ) Up to PN 400 (ANSI 2500) Flanged ends or Welding ends Will be replaced by the NRV-ZK NRV-G DN 250 (10 ) to DN 1200 (48 ) Up to PN 16 (ANSI 150) Flanged ends only NRV-K and NRV-R are still available on request, but will be replaced by NRV-ZSK und NRV-BK. 3
6 NRV-ZK Standard Face-to-Face Dimensions DN PN PN PN 160 PN 250 PN 400 ANSI 150 ANSI ANSI 900 ANSI 1500 ANSI 2500 mm inch mm inch mm inch mm inch mm inch mm inch , , , , , / , , , , , / , , , , , , , , , , / , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,20 Weights DN PN PN 40 PN 63 PN 100 ANSI 150 ANSI 300 ANSI 400 ANSI 600 mm inch kg lbs kg lbs kg lbs kg lbs / / / Face-to-Face dimensions and weights for other diameters and higher pressure classes on request. 4
7 NRV-ZK - Non-slam closure - Very low pressure loss - Short face-to-face length - Low weight - Metal sealing - Maintenance free - DN 25 (1 ) to DN 300 (12 ) - Up to PN 400 (ANSI 2500) The NRV-ZK is the advanced development of the well proven type NRV-Z. It is characterized by shorter face-to-face lengths and lower pressure losses. The NRV-ZK is suitable for all kind of liquid and gaseous fluids and all installation positions. We only use metallic materials, but on request soft sealing can be offered. Flanged in acc. with EN, ANSI, MSS, etc. Welding or hub ends on request. NRV-ZK 300 PN 100 (12 ANSI 600) NRV-ZK 25 PN 25 (1 ANSI 150) 5
8 NRV-ZSK Standard Face-to-Face Dimensions DN Face-to-Face Dimension mm inch mm inch , /4 50 1, /2 60 2, , /2 67 2, , , , , , , ,75 Weights DN PN PN 63 PN 100 PN 160 PN 250 ANSI ANSI 400 ANSI 600 ANSI 900 ANSI 1500 mm inch kg lbs kg lbs kg lbs kg lbs kg lbs / / / Face-to-Face dimensions and weights for other diameters and higher pressure classes on request. 6
9 NRV-ZSK - Non-slam closure - Low pressure loss - Very short face-to-face length - Very low weight - Metal sealing - Maintenance free - DN 25 (1 ) to DN 300 (12 ) - Up to PN 400 (ANSI 2500) The new NRV-ZSK will replace the well proven wafer type check valve NRV-K. With very short face-to-face lengths the NRV-ZSK offers much lower pressure losses. It is also suitable for all kind of liquid and gaseous fluids and all installation positions. Seat and disc are made of stainless steel, lapped in by hand. We only use metallic materials, but on request soft sealing can be offered. NRV-ZSK 150 PN 100 (6 ANSI 600) NRV-ZSK 150 PN 100 (6 ANSI 600), Material 6Mo for Sea Water 7
10 NRV-B Standard Face-to-Face Dimensions DN PN PN PN 160 PN 250 PN 400 ANSI ANSI ANSI 900 ANSI 1500 ANSI 2500 mm inch mm inch mm inch mm inch mm inch mm inch , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,09 Weights DN PN PN 40 PN PN 160 PN 250 ANSI 150 ANSI 300 ANSI ANSI 900 ANSI 1500 mm inch kg lbs kg lbs kg lbs kg lbs kg lbs Face-to-Face dimensions and weights for other diameters and higher pressure classes on request. 8
11 NRV-B - Non-slam closure - Very low pressure loss - Friction-free valve disc guiding - Metal sealing - Maintenance free - DN 300 (12 ) to DN 2200 (88 ) - Up to PN 400 (ANSI 2500) The uniqueness of this valve is characterized by the design of the valve disc ring which is guided friction-free by helical springs and our special radial guides. That leads to the main advantages: 1. Very low pressure losses due to the two ring-shaped annular flow passes 2. Non-slam closure of the disc in fractions of a second 3. Excellent dynamic behaviour due to low moving masses and friction-free guiding of the disc. Seat and disc are made of stainless steel, lapped in by hand. Flanged in acc. with EN, ANSI, MSS, etc. Welding or hub ends on request. NRV-B 1500 PN 25 (60 ANSI 150) NRV-B 400 PN 100 (16 ANSI 600), Special Face-to-Face Length 9
12 NRV-BK DN PN PN 40 PN 63 PN 100 ANSI 150 ANSI 300 ANSI 400 ANSI 600 mm inch mm inch mm inch mm inch mm inch , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,00 * , , , , ,28 * , , , , , , , , ,19 DN PN PN 25 ANSI 150 Standard Face-to-Face Dimensions *Special Face-to-Face Dimension Ductile Iron Weights PN 40 ANSI 300 PN 63 ANSI 400 PN 100 ANSI 600 mm inch kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs Face-to-Face dimensions and weights for other diameters and higher pressure classes on request. 10
13 NRV-BK - Non-slam closure - Low pressure loss - Friction-free valve disc guiding - Metal sealing - Short face-to-face length - Low weight - Maintenance free - DN 300 (12 ) to DN 2200 (88 ) - Up to PN 400 (ANSI 2500) The NRV-BK nozzle check valve combines the worldwide proven ring shaped valve disc / radial guide concept with short face-to-face lengths which of course leads to reduced costs. It replaces the type NRV-R. The NRV-BK is suitable for all kind of liquid and gaseous fluids and all installation positions. It contains only metallic materials. Flanged in acc. with EN, ANSI, MSS, etc. Wafer type or welding ends on request. NRV-BK 1600 PN 16 and 300 PN 16 (64 and 12 ANSI 125) NRV-BK 1000 PN 16 (40 ANSI 125) 11
14 NRV-G - Non slam closure - Lowest pressure loss - Maintenance free - Friction-free valve disc guiding - DN 250 (10 ) to DN 1000 (40 ) - Up to PN 16 (ANSI 150) This type of nozzle check valve has been on the world market for more than 70 years. Today they are mainly used by the water industry for waterworks, power plants or iron- and steel mills. The NRV-G series also has a ring-shaped valve disc which is guided friction free by helical springs and radial guides. NRV-G 600 (24 ) with bypasses, Pumping Station Mexico 12 Standard Face-to-Face Dimensions DN Face-to-Face Dimension mm inch mm inch , , , , , , , , , , ,99 Face-to-Face dimensions and weights for other diameters and higher pressure classes on request.
15 NRV-Z - Non slam closure - Low pressure loss - Maintenance free - DN 25 (1 ) to DN 250 (10 ) - Up to PN 400 (ANSI 2500) Well proven at thousands of installations worldwide, the NRV-Z will still be produced, but replaced by the new, more efficient NRV-ZK in the near future. NRV-Z 200 PN 400 (8 ANSI 2500) Refinery Brazil Face-to-Face Dimensions DN Face-to-Face Dimension mm inch mm inch , / , / , , / , , , , , , ,69 Face-to-Face dimensions and weights for other diameters and higher pressure classes on request. NRV-K NRV-R The NRV-K and NRV-R will be replaced by their advanced developments NRV-ZSK and NRV-BK, but will still be available on request. Spare parts supply is guaranteed. 13
16 Standard Materials Valve Types NRV-ZK and NRV-ZSK Body Seat Ring Valve Disc Spring Guide Flow Bush Diffuser Denomination Ductile Iron Carbon Steel Stainless Steel Body ASTM A 395 ASTM A 216 WCB ASTM A 351 CF8M Seat Ring AISI 431 AISI 431 ASTM A 351 CF8M Valve Disc AISI 431 AISI 431 AISI 316 Spring AISI 316 AISI 316 AISI 316 Guide Bush AISI 431 AISI 431 AISI 316 Flow Diffuser ASTM A 395 ASTM A 395 ASTM A 351 CF8M Materials according to customers request, such as Low Temperature Carbon Steel, Nickel-Aluminium-Bronze, Duplex, Superduplex, 6Mo, etc. are our speciality! 14
17 Standard Materials Valve Types NRV-B and NRV-BK Valve Body Seat Ring Hexagon Counter Spring Central Tie Bolt outer Screw Piece Seat Ring Valve Disc inner Radial Guide Flow Diffuser Denomination Ductile Iron Carbon Steel Stainless Steel Valve Body ASTM A 395 ASTM A 216 WCB ASTM A 351 CF8M Seat Ring AISI 431 ASTM A 743 CB 30 ASTM A 351 CF8M Valve Disc AISI 431 ASTM A 743 CB 30 ASTM A 351 CF8M Hexagon Screw ASTM A 193 B8M ASTM A 193 B8M ASTM A 193 B8M Counter Piece AISI 316 AISI 316 AISI 316 Radial Guide AISI 316 AISI 316 AISI 316 Spring AISI 316 AISI 316 AISI 316 Flow Diffuser ASTM A 395 ASTM A 395 ASTM A 351 CF8M Central Tie Bolt ASTM A 193 B7 - B8M ASTM A 193 B7 - B8M ASTM A 193 B8M Materials according to customers request, such as Low Temperature Carbon Steel, Nickel-Aluminium-Bronze, Duplex, Superduplex, 6Mo, etc. are our speciality! 15
18 End Connections Flanges: in acc. with EN, ANSI, MSS, API, etc. Valve Types: NRV-ZK, NRV-B, NRV-BK Welding Ends: in acc. with EN, ANSI, API, etc. Valve Types: NRV-ZK, NRV-B, NRV-BK Wafer Type: in acc. with EN, ANSI, MSS, API, etc. Valve Types: NRV-ZSK, NRV-BK Fully Lugged Wafer Type: in acc. with EN, ANSI, MSS, API, etc. Valve Types: NRV-ZSK, NRV-BK Hub Ends: in acc. with Grayloc, Techlok, etc. Valve Types: NRV-ZK, NRV-B Threaded Ends: Valve Type: NRV-ZK 16
19 Seat Details Seat Ring: Bronze, Stainless Steel, Duplex, Operating Temperature max C Hardfacing: Stainless Steel, Stellite Integral: All non-corrosive body materials 17
20 Characteristics Pressure losses Nozzle Check Valves Type NRV-ZK Valve fully open at 1,0 m/s (Water) Pressure loss in mbar Flow rate in l/min (Water) Dimensionsless Dynamic Curve of the Nozzle Check Valve Typ NRV-ZK Vr/Vo dv / dt x Di / Vo 2 18
21 Typical Applications Compressor Station Tank Farm Desalination Plant Valve A: Suction line - prevention of backflow through compressor. Valve B: Discharge line - prevention of backflow through compressor. Avoidance of reverse rotation of compressor leading to mechanical damage and line depressurization. Valve A: Prevention of backflow from tanks. Avoidance of loss of fluid in event of supply line rupture. Valve A & B: Prevention of cross flow between tanks of different levels. Avoidance of over pressurization, excessive vacuum and contamination. Valve C: Prevention of backflow into pump. Avoidance of reverse rotation leading to mechanical damage. Protection against loss of inventory in event of pump supply line rupture. Prevention of backflow and pressure surge. Energy saving due to low pressure losses. Reliability at about one million strokes per year. Water Distribution Prevention of backflow and pressure surge at multi-pump systems with or without surge vessel. Energy saving due to low pressure losses. Prevention of backflow and pressure surge at systems with high elevation. 19
22 Quality Management THE QUALITY REMAINS LONG AFTER THE PRICE HAS BEEN FORGOTTEN (Sir F. Henry Royce) 20 09/2009
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