{"product_id":"zh288-blue-spring-unloader-yub","title":"ZH288 Blue Spring Unloader YUB","description":"\u003cp\u003eZH288 Blue Spring Unloader 1\/2\" NPT\u003c\/p\u003e\n\u003cp\u003eYUB \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFEATURES:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImproved design, trapped pressure unloader\u003c\/li\u003e\n\u003cli\u003eReduced pressure loss\u003c\/li\u003e\n\u003cli\u003eExtremely reliable\u003c\/li\u003e\n\u003cli\u003eEasy maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eSPECIFICATIONS:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum volume: 21 GPM\u003c\/li\u003e\n\u003cli\u003eMaximum pressure: 4500 PSI\u003c\/li\u003e\n\u003cli\u003eMaximum temperature: 195F. The valve is designed for continuous use at a water temperature of 140F. It can operate for short periods at a maximum temperature of 195F.\u003c\/li\u003e\n\u003cli\u003eInlet: Dual 1\/2\" FPT\u003c\/li\u003e\n\u003cli\u003eDischarge: 1\/2\" FPT\u003c\/li\u003e\n\u003cli\u003eBypass: 1\/2\" FPT\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis product is intended to be incorporated on a finished machine. This product is to be used with clean fresh water, for use involving different or corrosive liquids, contact the GP Customer Service Department. Appropriate filtration should be installed when using impure liquids. Choose the valve\u003cbr\u003eappropriate to the working data of the pump (permissible pressure, flow and rated temperature of the system). The pressure of the pump must not exceed the maximum pressure of the valve.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eOPERATION\u003cbr\u003eThe valve regulates the maximum pressure of the system by varying the flow discharged by the bypass. The adjustment is made by altering, by\u003cbr\u003emeans of a piston, the position of a sphere which partially closes the bypass opening. The valve is sensitive to water flow. At gun opening, the water\u003cbr\u003eflows through the valve which maintains the system in pressure until the gun closes, the interruption of the flow provokes the complete aperture of\u003cbr\u003ethe bypass which allows to discharge the flow at low pressure. At gun closure, the special mechanism of zero setting, which does not include a check\u003cbr\u003evalve, keeps in connection the delivery line and the bypass line, in that way permitting to lower the pressure all around the system and not only in the\u003cbr\u003esource line of the valve.\u003c\/p\u003e\n\u003cp\u003eINSTALLATION\u003cbr\u003eThis valve, on a system that produces hot water, must be fitted upstream from the source of heat. On a system that generates hot water, it is advisable to use accessories that limit the accidental increase of fluid temperature. Always install a safety valve. We recommend the use of a nozzle with flow rate which allows a regular discharge from the valve bypass of at least 5% of the flow supplied by the pump. In order to achieve a constant pressure\u003cbr\u003eand easy adjustment. If the nozzle wears out, the pressure decreases. To reset pressure back to working level, it is necessary to replace the worn nozzle. When a new nozzle is fitted, resetting of the system to its original working pressure is required.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eDISCHARGE SYSTEM AND WATER ADDUCTION\u003cbr\u003eThe bypass discharge can be sent back to the pump intake or returned into a tank; in such cases it is advisable that the tank be fitted with baffles to reduce eventual turbulence and air bubbles which could be harmful to the pump.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003ePRESSURE ADJUSTMENT\/CALIBRATION\u003cbr\u003eThe desired working pressure must be adjusted with the system running and the gun opened. Adjust the pressure by screwing or unscrewing the adjustment knob. The operation is easier if the correct nozzle has been chosen (see above). When screwing the adjustment nut a consequent pressure increase must be matched. If, before reaching the desired pressure, there is no pressure increase, DO NOT FORCE. Rather, check the correct ratio of nozzle\/flow rate - pressure and, if necessary, replace with a smaller size nozzle.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eATTENTION: the nut in position 24 is a mechanical security device that limits the maximum pressure; it must absolutely NOT be removed.\u003c\/p\u003e","brand":"MPWSR","offers":[{"title":"Default Title","offer_id":55808496271433,"sku":"6965","price":154.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/3487\/5465\/files\/file_9d96a359-5b62-439d-986d-1f1bf5476c81.jpg?v=1783998880","url":"https:\/\/thewashingstore.com\/products\/zh288-blue-spring-unloader-yub","provider":"The Washing Store","version":"1.0","type":"link"}