Gestra Products Technical - Control And Power

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Description 1. Conductivity Measurement NRG 16-42 The level electrode type NRG 16-42 works according to the conductivity measurement principle. With the NRG 16-42 a maximum of four levels can be signalled in conductive liquids: n Four levels with one switchpoint each n High-level alarm, first low-level alarm, pump on, pump off, with one switchpoint each Use level electrode NRG 16-42 in combination with level switch type NRS 1-42 or other system components. The level data are transferred to the level switch or any other system component via a CAN data bus. NRS 1-42 Use level switch type NRS 1-42 in combination with level electrode type NRG 16-42 for level monitoring. The level switch has the following functions: n Four levels with one switchpoint each n High-level alarm, first low-level alarm, pump on, pump off, with one switchpoint each The level data are transferred from the electrode NRG 16-42 to the level switch via a CAN bus. 2. Capacitance Measurement NRG 26-40 The level electrode NRG 26-40 works according to the capacitance measurement principle. The NRG 26-40 is used for detecting and signalling different levels in conductive and non-conductive liquids: n Level always within defined measuring range of electrode. Use level electrode NRG 26-40 in combination with level switch type NRS 2-40 or further system components. Differences between URB 1 and URB 2 90 The level data are transferred to the level switch or any other system component via the CAN data bus. NRS 2-40 Use level switch type NRS 2-40 in combination with level electrode type NRG 26-40 for level control and monitoring. The level switch has the following functions: n Four liquid levels with one switchpoint each n High-level alarm, first low-level alarm, pump on, pump off, with one switchpoint each The level switch NRS 2-40 can be optionally equipped with an actual value output for standard signal 4-20 mA. The level data are transmitted from the electrode NRG 26-40 to the level switch via a CAN data bus. If you want to connect a second NRS 2-40 in order to establish additional switchpoints please indicate this when ordering. NRR 2-40 Use level controller NRR 2-40 in combination with level electrode type NRG 26-40 for level control and monitoring. The level controller has the following functions: n Two limit values with one switchpoint each (high-level alarm and first low-level alarm) n Three-position or modulating control within a predefined proportional band n All contacts feature time delays adjustable between 1 – 25 sec. n Continuous level monitoring within defined measuring range of the electrode. The NRR 2-40 features an optional output for standard signal 4-20 mA, which can be used for actual value and/or modulating control. The level data are transferred from the electrode NRG 26-40 to the level controller via a CAN data bus. URZ 40 As an alternative to the control system via a three-position stepping output, the URZ 40a can be mounted to the control valve in order to provide the control function for the CAN bus. URB 1 / 2 The URB is a user-friendly control terminal and display unit for use with GESTRA CAN bus systems. With the URB all standard functions of the CAN bus system can be easily called up and adjusted. Furthermore, the URB makes the parameterization of the controller very convenient: The switchpoints and the proportional band can be adjusted by means of the keypad regardless of the actual level. The energizing and de-energizing times of the relays can be customized for the individual switchpoints. The LCD of the URB displays the following: n Current liquid level (second water level) (TRD 401, EN 12952, ...53) n Current conductivity value (TSD control) n Proportional band of controller (NRR 2-40), (LRR 1-40) n Switchpoints n Position and value of switchpoint low level n Position and value of switchpoint high level n Position of set point (NRR 2-40), (LRR 1-40) n Deviation n Valve position n Manual/automatic operation n Current CAN bus address n Indication of high/low level alarm n Temperature (URB 2) n Pressure (URB 2) Function URB 1 URB 2 Display Level Control Graphic display 124 x 64 pixel, 58 x 40 mm ¼ VGA, monochrom 320 x 240 pixel, 115 x 85 mm Colour display No Optional Basic window Bar chart Numerical Bar chart Numerical Level Conductivity Level Conductivity Level Level Conductivity Pressure Temperature Operation Via push-button Via control knob Navigation in the menu Via push-button Via control knob Password protection (to avoid operating errors) No Yes Software update No Yes, Flash System freely expandable No Yes, software update Connection for camera (e. g. local water level indicator) No Yes, colour display
On-off control with fixed switchpoints Spector BUS system Multiple level electrode NRG 16-42 1" BSP On-off control with adjustable switchpoints Spector BUS system Level electrode NRG 26-40 ¾" BSP Level switch NRS 2-40 Modulating control with high-level alarm and first low-level alarm Spector BUS system Level electrode NRG 26-40 ¾" BSP Connecting flange DN 50 mm Level switch NRS 1-42 High level Pump OFF Pump ON First low-level alarm Connecting flange DN 50 mm High level Pump OFF Pump ON First low-level alarm Connecting flange DN 50 mm High level Level control First lowlevel alarm URZ 40a Level Control Second device Level controller NRR 2-40 Feedwater control valve V 725 DN 50 mm High-level alarm Control terminal and display unit URB 1 (2) (optional) First low-level alarm High-level alarm First low-level alarm Control terminal and display unit URB 1 (2) (optional) High-level alarm First low-level alarm High-level alarm First low-level alarm Control terminal and display unit URB 1 (2) Type PN Stock code NRG 16-42 NRS 1-42 L = 1000 mm 230 V 40 3534248 3222241 Optional: URB VDU 3381043 Optional 115 V, 50..60 Hz Type approval TÜV WR 04-399 Type PN Stock code NRG 16-40 NRS 2-40 Type approval TÜV WR 04-399 TÜV SWB/SHWS 07-403 Type approval TÜV WR 04-399 H = 1000 mm 230 V 40 3484047 3223041 Optional: URB VDU 3381043 NRS 2-40 optional 115 V, 50..60 Hz Actual value output 4-20 mA Second device .57 .59 Type PN Stock code NRG 26-40 NRR 2-40 H = 1000 mm 230 V 40 3484047 3225041 URB VDU 3381043 NRR 2-40 optional 115 V, 50..60 Hz Actual value output 4-20 mA Output for continuous controller 4-20 mA Optional: URZ 40a CANbus-Interface For flanges see Price List .57 .58 91 B
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GESTRA Technical Information Steam
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GESTRA Steam Traps and Steam Trap M
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For steam and energy management, we
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Thermostatic Steam Traps BK with Du
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Thermostatic Steam Traps MK with Me
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Ball-Float Traps UNA PN 1 - PN 1 0
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Ball-Float Traps UNA PN 1 - PN Capa
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Thermodynamic Steam Traps DK PN 0,
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Steam Traps for Special Application
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Steam Traps for Special Application
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Steam Trap Units ECONOline for UNIV
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Testing Steam Traps Like any other
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Steam Trap Monitoring Equipment Sys
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Condensate Collector and Steam Mani
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GESTRA DISCO Non-Return Valves 30 G
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DISCO ® Non-Return Valves RK, PN 6
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Page 40 and 41: DISCO ® Non-Return Valves RK, PN 6
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Page 44 and 45: DISCOCHECK ® Dual-Plate Check Valv
Page 46 and 47: DISCOCHECK ® Dual-Plate Check Valv
Page 48 and 49: DISCO ® Swing Check Valves CB DN 5
Page 50 and 51: Swing Check Valves WB without sprin
Page 52 and 53: NAF-Check Valves DN 40 - 1000 mm, P
Page 54 and 55: GESTRA Control Valves ZK 54 GESTRA
Page 56 and 57: Cooling Water Control Valves CW GES
Page 58 and 59: Return-Temperature Control Valves B
Page 60 and 61: Return-Temperature Control Valves B
Page 62 and 63: Self-Acting Pressure Control Pressu
Page 64 and 65: Self-Acting Temperature Controllers
Page 66 and 67: Control Valves with Electric and Pn
Page 68 and 69: Control Valves ZK with Radial Stage
Page 70 and 71: Control Valves ZK with Radial Stage
Page 72 and 73: Strainers GSF H H 1 H H 1 72 B S
Page 74 and 75: Stop Valves GAV H 1 74 L1 Stop Valv
Page 76 and 77: SPECTOR Product Range GESTRA’s SP
Page 78 and 79: How to Read Type Codes GESTRA Type
Page 80 and 81: GESTRA Steam Plant D 80 T P S A J B
Page 82 and 83: Fundamental Principles of Measureme
Page 84 and 85: Type Approvals at a Glance GESTRA B
Page 86 and 87: Type Approval Nos. at a Glance Type
Page 88 and 89: Level Limitation Low-Level Limiter
Page 92 and 93: SPECTORcompact Where formerly two d
Page 94 and 95: Self-Monitoring Low/High-Level Alar
Page 96 and 97: Modulating Level Control - Conventi
Page 98 and 99: Accessories for Liquid-Level Alarms
Page 100 and 101: Level Probes and Control Units for
Page 102 and 103: Marine Applications Level Electrode
Page 104 and 105: GESTRA Equipment for Energy Supply
Page 106 and 107: Temperature Control Bus NrS 1-40.1
Page 108 and 109: Temperature Control Conventional Tr
Page 110 and 111: Conductivity Monitoring Basic Princ
Page 112 and 113: Conductivity Spector Bus/Compact Lr
Page 114 and 115: Conductivity Monitoring with Manual
Page 116 and 117: Conductivity Monitoring with Manual
Page 118 and 119: Ancillaries: Level Pots and Portabl
Page 120 and 121: Continuous Blowdown Valves 120 L BA
Page 122 and 123: Programme-Controlled Blowdown Syste
Page 124 and 125: Rapid-Action Intermittent Blowdown
Page 126 and 127: Contamination Detectors for Condens
Page 128 and 129: Ingress of Oil in Cooling Water Sys
Page 130 and 131: Flowmeters for Steam, Gases and Liq
Page 132 and 133: GESTRA SPECTOR Family SpECTorcom/co
Page 134 and 135: Condensate Recovery and Return Syst
Page 136 and 137: Closed-Type Condensate Recovery and
Page 138 and 139: Steam Powered Condensate Return Tan
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Steam Regenerators Steam regenerato
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Flash Vessels Type VD Flash Vessels
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Condensate Dampening Pot ED Technic
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Controls Pump Controls Function The
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Questionnaire for preparing offers
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156 Our Mobile Testing Station For
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Technical Advice and Training Semin
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Useful Conversions MASS 1 kilogramm
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EC Pressure Equipment Directive (PE
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EC Pressure Equipment Directive (PE
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Combined Imperial and S. I. Steam T
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DIN Material Reference Chart 168 EN
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Technical Literature Technical Docu
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Index by Product Name Product Type
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Index by Product Name Product Type
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Index by Product Code Type Product
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Note: Responable care has been take
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Gestra Products Technical - Control And Power

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