MAKING MODERN LIVING POSSIBLE Pressure controls, dierential pressure controls Type RT Technical brochure

Technical brochure Pressure controls, dierential pressure controls, type RT Page Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Technical brochure Pressure controls, dierential pressure controls, type RT An RT pressure control contains a pressure operated single-pole changeover contact, the position of which depends on the pressure in the inlet connection and the set scale value. The RT series includes pressure controls for general applications within industrial and marine refrigeration. The RT series also includes dierential pressure controls, pressure controls for neutral zone regulation, and special pressure controls with goldplated contact surfaces for PLC applications. Technical data Suitable for alternating and...

Technical brochure Pressure controls, dierential pressure controls, type RT Materials in contact with the medium Stainless steel 18/8 Stainless steel 17/7 Brass Brass Stainless steel 18/8 Plain carbon steel Deep drawing steel Plain carbon steel Case-hardened steel Aluminium Stainless steel 18/8 Plain carbon steel Deep drawing steel Zinc plated, passivated (RT 1A, RT 1AL only) Nickel-plated, tinned Zinc plated, passivated Nickel-plated Zinc plated, passivated (RT 1 only) Nickel-plated, tinned Stainless steel 18/8 Deep drawing steel Case-hardened steel Free-cutting steel Plain carbon steel Aluminium...

Technical brochure Pressure controls, dierential pressure controls, type RT Ordering (continued) Safety pressure controls w EN 12263 / DIN 32733 appr. and CE marked acc. PED, Pressure Equipment Directive*) Regulation range Pressure Max. Max. working test Reset pressure pressure PB p´ bar bar *) Meets the requirements in VBG 20 on safety equipment and excess pressures. W = Wächter (pressure control). B = Begrenzer (pressure control with external reset). S = Sicherheitsdruckbegrenzer (pressure control with internal reset). A rupture in the bellows system of the unit will cause the compressor to...

Technical brochure Pressure controls, dierential pressure controls, type RT Ordering (continued) Special versions RT can be supplied with special switches as follows. When ordering, please state: 1. Type 2. Code no. of standard unit 3. Code no. of special switch Contact load Single-pole changeover switch with terminal board proof against leakage current Fitted in all standard versions of type RT. Snap action changeover contacts. Alternating current 2) Ohmic: AC 1 = 10 A, 400 V SPDT For manual reset of unit after contact changeover on rising pressure. For HP units prepared for reset facility....

Technical brochure Pressure controls, dierential pressure controls, type RT Design Function Pressure control type RT Setting knob Regulation range scale Loop terminal Pg 13.5 screwed cable entry Main spring Terminals Main spindle Switch Guide bush Contact arm Dierential setting nut Bellows element Fixing hole Connection Earth terminal Blow-out disc Pressure setting spindle Key sketch RT pressure control The bellows in the RT pressure control is connected to the low or high pressure side of the controlled system via the connection. By turning the setting knob (5) the main spring (12) can be set...

Technical brochure Pressure controls, dierential pressure controls, type RT Design Function (continued) Pressure control with dead zone, type RT L Setting knob Regulation range scale Pg 13.5 screwed cable entry Main spring Main spindle Switch Upper guide bush 18a, 18b. Contact arm Lower guide bush Bellows element Fixing hole Connection Earth terminal Blow-out disc Neutral zone setting nut Pressure setting spindle Key sketch RT L pressure control RT L pressure controls are tted with a switch (17-4032) with an adjustable neutral zone. This enables the units to be used for oating control. The neutral...

Technical brochure Pressure controls, dierential pressure controls, type RT Design Function (continued) Dierential pressure control, type RT LP connection LP bellows element Setting disc Regulation range scale Coil clamp Pg 13.5 screwed cable entry Main spring Terminals Main spindle Switch Upper guide bush Contact arm Lower guide bush HP bellows element Fixing hole HP connection Earth terminal Blow-out disc Key sketch RT dierential pressure control RT dierential pressure control An RT dierential pressure control contains a single-pole changeover switch that makes or breaks depending on the pressure...

Technical brochure Pressure controls, dierential pressure controls, type RT Floating control A form of delayed control where the correcting element (e.g. valve, damper, or similar) moves towards one extreme position at a rate independent of the magnitude of the error when the error exceeds a denite positive value, and towards the opposite extreme position when the error exceeds a denite negative value. Hunting Periodic variations of the controlled variable from the Fixed reference. Neutral zone The interval between the make points of the two contacts. RT with automatic reset - LP The knob is...

Technical brochure Pressure controls, differential pressure controls, type RT RT pressure control housing

Technical brochure Pressure controls, differential pressure controls, type RT Danfbss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice.This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfbss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.