SECTION
6
Low Water Cut-Offs & Feeders Low Water Cut-Offs — Mechanical for Steam Boilers Series 150S Low Water Cut-Off/Pump Controllers
Series 150S
• For commercial and industrial low or high pressure boiler applications. • For boilers of any steaming capacity. • Monel bellows provides corrosion resistance. • Snap action switches for high temperature service. – 1 Single pole, single throw switch for pump control. – 1 Single pole, double throw switch for low water cut-off and alarm actuation. • Optional features: – Manual reset. – 2 Single pole, single throw switches. – 2 Single pole, double throw switches. – Float block. – BSPT threads. • Maximum pressure 150 psi. mfr# Model# description webb# 172702 150SM Steam Low Water Cut Off 12463
Water Feeders — Electric Series WF Uni-Match®
mfr# Model# description webb# WF-2-U-120 169560 120 Volt Electric Water Feeder 69797 WF-2-U-24 169550 12 Volt Electric Water Feeder 47073
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F.W. Webb Company
63
6 Hydronics/steam
Series WF
• For low pressure steam boilers with cold water feed. • Three position slide allows the timing cycle to be matched to that of the major low water cut-off manufacturers. • Field adaptable feed rate – 1, 2, or 4 gpm. • Electronic operation provides consistent, accurate cycle-to-cycle repeatability. • Universal design simplifies selection and reduces stock. • Can be used with mechanical or electronic low water cut-off controls. • Manual feed button. • Includes 3/8 NPT thread x 1/2” tubing adapters for quick installation with 1/2” copper tubing • Easy to clean strainer. • Maximum water pressure 150 psi. • Maximum boiler pressure 15 psi. • Maximum water temperature 120°F. • Maximum ambient temperature 100°F. • Maximum power consumption (during water feed only). – 15 VA at 24 Vac. – 20 VA at 120 Vac.