Série UB25Chave de fluxo em linha — corpo maciço em inox 316
Chave de pistão acionada magneticamente com corpo usinado maciço em aço inoxidável 316 — pressão nominal 200 bar, suporta líquidos até 90 °C. Ideal para pressurização de água quente/fria, sistemas de água quente por gravidade, chuveiros de segurança e outras aplicações de alta confiabilidade.
Recursos
- Adequado para tubulações 25 NB (1 polegada)
- Montagem versátil em qualquer posição
- Pressão nominal 200 bar / 2900 psi
- Comuta em vazões muito baixas
- Carcaça à prova de intempéries IP67
- Corpo metálico usinado maciço em inox 316
- Alta capacidade nominal de passagem de fluxo
- Suporta líquidos até 90 °C
- Ponto de comutação de 1,5 L/min em um fluxo com aumento lento, conforme fornecido (0,23 L/min com o retentor de pistão não magnético)
O corpo do UB25 é usinado em aço inoxidável 316 maciço. No interior, um pistão deslizante livre (polipropileno reforçado com fibra de vidro; nylon nos modelos diesel -D) é empurrado para trás pelo fluxo até que o líquido passe ao redor. O pistão aciona uma chave acoplada magneticamente e é empurrado de volta à posição desligada por repulsão magnética quando o fluxo para — não há molas na área molhada. O pistão e a carcaça elétrica são de polipropileno reforçado com fibra de vidro. Entrada macho BSPT de 25 mm (1") e saída fêmea BSPT de 1"; três módulos elétricos disponíveis, além de um modelo diesel -D.
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Pedido — Modelos disponíveis
Limites de operação
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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).
Manutenção
Totalmente sujeito a manutenção em campo. Para fazer a manutenção do pistão, retire o anel elástico (circlip) da porta de saída; a maioria dos componentes da chave está disponível em kits de peças de reposição. O módulo elétrico se desparafusa do corpo de inox sem desmontar a tubulação. Pistões de reposição (variantes para água e diesel), vedações e módulos elétricos disponíveis na Kelco Engineering ou no seu distribuidor.
