Série UB25Détecteur de débit en ligne — corps massif inox 316
Détecteur à piston à actionnement magnétique avec corps massif usiné en acier inoxydable 316 — pression nominale 200 bar, accepte les liquides jusqu’à 90 °C. Idéal pour la surpression d’eau chaude/froide, les systèmes gravitaires d’eau chaude, les douches de sécurité et autres applications à haute fiabilité.
Caractéristiques
- Convient aux tuyauteries 25 NB (1 pouce)
- Montage toutes positions polyvalent
- Pression nominale 200 bar / 2900 psi
- Commute à très faibles débits
- Boîtier IP67 étanche aux intempéries
- Corps métal massif inox 316 usiné
- Capacité de débit nominal élevé
- Accepte les liquides jusqu’à 90 °C
- Point de commutation de 1,5 L/min sur un débit croissant lentement, tel que livré (0,23 L/min avec le dispositif de retenue de piston non magnétique)
Le corps de l’UB25 est usiné dans de l’acier inoxydable 316 massif. À l’intérieur, un piston coulissant libre (polypropylène renforcé de fibre de verre ; nylon sur les modèles diesel -D) est repoussé par le débit jusqu’à ce que le liquide passe autour. Le piston actionne un interrupteur à liaison magnétique et est ramené en position arrêt par répulsion magnétique à l’arrêt du débit — il n’y a aucun ressort dans la zone humide. Le piston et le boîtier électrique sont en polypropylène renforcé de fibre de verre. Entrée mâle BSPT 25 mm (1") et sortie femelle BSPT 1" ; trois modules électriques disponibles, plus un modèle diesel -D.
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Warning: Electrical Safety
The UB25 Series flow switch is a mains voltage device. Death or serious injury may result if this switch is not correctly installed and operated. All electrical work on this switch must be performed by a fully qualified and licensed electrician.
Two Piston Retainers Supplied
The UB25 is supplied as standard with a magnetic piston retainer that allows the switch to be oriented in any required position in pipework; in vertical pipework flow can be either upward or downward through the switch. A non-magnetic piston retainer is also supplied with each switch — when this is fitted, the switch must be oriented vertically with flow passing upward through its body, and the flow rate required to actuate the switch is approximately 6.5 times lower (0.23 L/min rising and 0.18 L/min falling, ±15%, against 1.5 and 1.2 L/min as supplied). It is commonly used to enhance the sensitivity of the switch in gravity head applications such as boosting water pressure in gravity fed hot water systems.
Dieseline Model (-D)
Order the -D suffix (e.g. UB25-B-D) for the Dieseline model. The piston is glass reinforced polypropylene on standard models and nylon on Dieseline -D models. The solid 316 stainless steel body is suitable for neutral liquids such as hot or cold water, or oils.
Mounting & Pump Installation
The UB25 can be mounted in any orientation in the pipework, including upside down, in horizontal or vertical pipework. There is a direction of flow arrow on the electrical enclosure; the switch will not operate against a reversed flow. Pipework can be used to support the switch, or it can be screwed directly into valve manifolds or pump ports — use thread tape or sealant. Do not use this flow switch as a non-return valve. In the typical pressure boosting installation the switch is fitted to the pump discharge, with a Y strainer on the pump inlet and a non-return valve downstream of the flow switch.
Clean Fluid & Line Filtration
The UB25 contains a close fitting piston and should only be used where the process fluid is reasonably clean and free of entrained or suspended material. It should not be used with fluids containing large particulate matter, ferrous materials or fibrous matter. If the degree of contamination of the process fluid can’t be guaranteed, fit suitable line filtration to the system.
Servicing the Piston
To service the piston or to install the non-magnetic piston retainer, use long nosed pliers to remove the spring circlip in the outlet port of the switch. Press the piston back with your finger; it should pop out along with its three finned magnetic retainer. Ensure there are no pieces of iron scale adhered to the piston or retainer and that both parts are free of damage. Reassemble the switch and test it to ensure the piston is a free and smooth fit.
Typical Applications
Hot and cold water pressure boosting, gravity hot water system control, hot water circulation actuation, safety shower alarm sentinel, wash down pump control, solar hot water control, mains pressure boosting and constant pressure pump control.
Hazardous Areas
The UB25-B and UB25-C (including -D models) are simple apparatus under AS/NZS 60079.11 and may be used in a hazardous area only as part of an intrinsically safe circuit, connected through suitably certified associated apparatus. They are not Ex certified in their own right. The full conditions of use are given in the installation sheet. The UB25-R and UB25-R-D are not certified for use in hazardous areas and must not be installed in any area classified as hazardous under AS/NZS 60079.10 (Zone 0, 1, 2, 20, 21 or 22).
Maintenance
Entièrement entretenable sur site. Pour entretenir le piston, retirer le circlip à ressort dans l’orifice de sortie ; la plupart des composants de l’interrupteur sont disponibles en kits de pièces de rechange. Le module électrique se dévisse du corps inox sans démontage de la tuyauterie. Pistons de rechange (variantes eau et diesel), joints et modules électriques disponibles auprès de Kelco Engineering ou de votre distributeur.
