G49J three-way rubber-lined diaphragm valve, G49J-10 type rubber-lined valve is used to change the passage section and the flow direction of the medium. It has the functions of diversion, cut-off, adjustment, throttling, check, diversion or overflow. Valves can be used to control the flow of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals, and radioactive fluids.
G49J three-way rubber-lined diaphragm valve is specially used to control non-corrosive or general corrosive media. The internal cavity surface of the valve is unlined or covered with various rubbers for selection, suitable for different working temperatures and fluid pipelines. The variety of lining materials can be applied to various media and has good corrosion resistance. The valve body and the cover are separated by the middle diaphragm, so that the valve cover above the diaphragm and the valve stem parts are not corroded by the medium. The diaphragm valve is a special form of shut-off valve.
| Design standards | GB12239 |
| Structure length | JB1688/GB12221 |
| Flange standard | JB78 |
| GB4216 | |
| Inspection test | GB/T13927 |
| Drive method | Manual, electric, pneumatic, normally closed, normally open |
Material table of main parts of rubber-lined diaphragm valve
| NO. | Name | Grey cast iron | Cast steel | Stainless and acid-resistant cast steel | Ultra-low stainless steel and acid-resistant cast steel | ||
| Z | C | P | R | P | R | ||
| 1 | Valve body/Bonnet | HT250 | WCB | CF8 | CF8M | CF3 | CF3M |
| 2 | Disc/Stem | 35 | 1cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 00cr18Ni10 | 00Cr17Ni14Mo2 |
| 3 | Lining/Seat | PTFE(F4)、PCTFE(F3)、FEP(F46)、PFA(Soluble F4) | |||||
| 4 | Diaphragm | FEP(F46)/CR(Neoprene)、PFA(Soluble F4)/FPDM（Ethylene Propylene Rubber） | |||||
| 5 | Bracket | WCB | CF8 | CF8 | |||
| 6 | Stem nut | ZCuAI10Fe3 | ZCuAI10Fe3 | ZCuAI10Fe3 | |||
| 7 | Fastening bolt | 35 | 1Cr17Ni2 | 1Cr18Ni9Ti | |||
| 8 | Nut | 45 | 0Cr18Ni9 | 0Cr18Ni9 | |||
| 9 | Handwheel | WCB | WCB | WCB | |||
Applicable temperature: ≤85℃, ≤100℃, ≤120℃, ≤150℃ (according to lining and diaphragm material)
Pressure rating: PN (MPa) 0.6 1.0 1.6
Material:
Valve body: cast iron, ductile iron, carbon steel, stainless steel
Bonnet: cast iron, ductile iron, carbon steel, stainless steel
Lining: no lining, rubber
Diaphragm: rubber
Disc: cast iron, carbon steel
Stem: carbon steel, stainless steel
Handwheel: cast iron
Test:
Lining layer: electric spark detection
Test and inspection according to BS6755 standard
Nominal pressure: PN(MPa)
Valve body: PN×1.5
Sealing: PN×1.1
Structural features:
Diaphragm valve is a special form of shut-off valve:
1. The opening and closing parts of elastic sealing ensure that there is no internal leakage;
2. The streamlined flow channel makes the pressure loss small;
3. There is no stuffing box, so there is no leakage;
4. The valve body and the cover are separated by the middle diaphragm, so that the valve cover, valve stem and other parts above the diaphragm are not corroded by the medium;
5. The diaphragm can be replaced and the maintenance cost is low;
6. The variety of lining materials can be applied to various media, and has the characteristics of high strength and good corrosion resistance.
