"Honeywell (Honeywell) Valve" 200X regulator valve is a medium pressure pipeline itself as a power source, the opening and closing, regulation, leading to a small valve and piping system with different combinations, with nearly 30 species can be function, is now gradually being more widely used. Pilot valve by the water as a control object movement and pressure changes, due to many different types of pilot valve can be used alone or several in combination, can make the main valve to get the water level and water pressure and flow regulation of separate or combined function. But the main valve similar to the cut-off valve, the valve fully open, the pressure loss is much greater than the other valves, and the more the loss coefficient of each opening and closing nearly all the more dramatic increase, the greater the more the valve diameter significant. With the characteristics of the valve, near the fully closed, the valve flap moves accelerated prone to water hammer (the impact of water pressure), close to the fully closed, the valve moves more slowly as possible, so the disc can be set in throttle body. Another pilot valve and the action part of the throttle settings to try to avoid special small diameter orifice, in order to avoid congestion. Necessary to add filters, regular maintenance and the provision of the bypass pipe. This valve, the use of a good prospect. Hydraulic control valve is pressure-controlled valve, which consists of a main valve and pilot valve attached to the catheter ﹑ ﹑ ﹑ needle valve and pressure gauges and other components. Use of hydraulic control valves, first note selection. Improper selection can cause blocking water and air leaks. Selection of hydraulic control valve, the device must be multiplied by the steam consumption per hour 2-3 times the rate for the largest selection of condensation of water, to select a displacement of the hydraulic control valve. To ensure the hydraulic control valve in the car discharge condensate as soon as possible, rapidly increasing the temperature of the heating equipment. Emission energy of the hydraulic control valve is not enough, will cause condensation of water can not be discharged in time to reduce the thermal efficiency of heating equipment. Selection of hydraulic control valve, hydraulic control can not be selected nominal pressure valve, hydraulic control can only say that because the nominal pressure level of the body shell, hydraulic control valve nominal pressure and working pressure varies greatly. So choose according to the work of the hydraulic pressure control valve displacement. Working pressure of hydraulic control valve is working before the hydraulic control valve outlet pressure minus back pressure difference. Hydraulic control valve selection requires an accurate and precise gas drainage resistance, high sensitivity, can increase the utilization of steam is not leaking steam, reliable performance, high back pressure, long life, easy maintenance is the preferred conditions. 
 How it works: diaphragm type hydraulic control valve and piston-type sub-categories, the main components are a main valve and its attached catheter, pilot valve, needle valve, ball valve and pressure gauges and other components. It uses the upstream and downstream pressure difference as the driving force controlled by the pilot valve so that the diaphragm (piston) pressure of the control room above the water is discharged to the atmosphere or the downstream area of low pressure, the role of the bottom plate and the diaphragm in the valve below the pressure value is greater than the top pressure value, so will push the main valve disc to the fully open position, when entering the diaphragm (piston) pressure above the control room can not be discharged to the atmosphere or downstream of the low area, acting on the diaphragm (piston) at the top of the pressure value is large below the pressure value, so will the pressure of the main valve disc to the fully closed position, when the diaphragm (piston) pressure above the control room in the middle of the inlet pressure and outlet pressure, the main valve disc to the state in regulating its adjust the position depends on the duct system and adjustable needle valve of the combined effects of lead. Adjustable pilot valve outlet pressure through the downstream and changes with the opening of its large or small their own off the small valve port, thus changing the diaphragm (piston) pressure above the control room, control the regulation of the main valve disc position.