YD13H / YD43H Pilot super high sensitivity diaphragm valve is the reference foreign advanced products and successfully developed a new type of pilot-large diaphragm valve, pilot valve with high sensitivity in large diaphragm valve on the basis of common He has done a lot of improvement. Diaphragm using a new material, and greatly processed work area, so the upstream or downstream valve pressure load subtle changes can be timely and accurate feedback to the main valve diaphragm to regulate the opening of the main valve, ensure the stability of the downstream pressure. Another prominent feature of the pilot-large diaphragm valve is highly sensitive: the body can be installed on the same and interchangeable multiple pilot valve in regulation, while achieving temperature control, control the upstream pressure, remote switch control. The main technical parameters Nominal pressure (Mpa) 2.5 Shell test pressure (Mpa) * 3.75 Sealing test pressure (Mpa) 2.5 maximum inlet pressure (Mpa) 2.5 outlet pressure range (Mpa) 0.02-1.6 pressure characteristic deviation (Mpa) △ P2P GB12244 -1989 flow characteristic deviation (Mpa) P2G GB12244-1989 leakage GB12245-1989 *: shell test does not include the diaphragm, the valve cover. The main part material Part name Material Body parts Bonnet WCB Seat 2Cr13 valve stem 2Cr13 2Cr13 1Cr18Ni9Ti diaphragm spring 60Si2Mn regulate the flow coefficient Cv DN 15 20 25 32 40 50 Cv 2.9 5.3 8.6 11.6 16.5 29.1 The main dimensions YD13H Pilot Large diaphragm valve with high sensitivity (female) DN Rc L H1 HD 15 1/2 147 221 133 185 20 3/4 154 224 136 185 25 1 160 235 145 207 32 1-1 / 4 180 236 156 207 40 1-1 / 2 200 238 176 255 50 2 230 246 183 255 YD43H Pilot Oversized diaphragm valve with high sensitivity (flange) DN L H1 HD 15 147 235 145 207 20 154 235 145 207 25 160 235 145 207 32 180 250 1,602,204,016,250,160,220 50230270180220