Lined gate valve
I. Introduction:
The opening and closing part of the Z41F46 fluorine-lined gate valve is the gate, whose movement direction is perpendicular to the fluid direction. The gate valve can only be fully opened or fully closed, and cannot be used for regulation and throttling. The gate has two sealing surfaces. The two sealing surfaces of the most common wedge gate valve form a wedge, and the wedge angle varies with valve parameters, usually 50°, and 2°52' when the medium temperature is not high. The gate of the wedge gate valve can be made as a whole, called a rigid gate; it can also be made as a gate that can produce slight deformation, to improve its processability, and to make up for the deviation of the sealing surface angle generated during the processing, this kind of gate is called an elastic gate.
II. Structural Features:
1. All parts directly contacting the medium, such as the inner cavity of the valve body and valve cover, and the outer surface of the gate and valve stem, are lined with fluoroplastics such as FEP (F46);
2. The sealing pair is composed of FPF (F46)/FEP (F46) or other materials, with small friction coefficient and low opening and closing torque;
3. The packing adopts PTFE (F4) standard packing, which has good sealing performance and is convenient for maintenance and replacement;
4. The elastic gate can compensate for the wedge angle deviation between the gate sealing surface and the valve seat sealing surface, with good fit and ideal sealing effect;
5. The medium can pass through the gate valve from either side, making it suitable for opening and closing devices on pipelines where the medium direction may change.
A. The product has few connecting parts and good overall rigidity.
B. Fast flow interception speed.
C. The opening limit mechanism is convenient, flexible and accurate.
D. Compact and beautiful appearance.
E. Simple operation, labor-saving and convenient maintenance.
F. Small fluid resistance, and the sealing surface is less eroded by the medium.
G. The medium flow direction is not restricted, no turbulence, and no pressure reduction.
III. Parts:
Serial No. | Part Name | Grey Cast Iron | Cast Steel | Acid-Resistant Cast Steel | Ultra-Low Carbon Acid-Resistant Cast Steel | ||
Z | G | P | R | PL | PL | ||
1 | Valve Body/ End Cover | HT250 | WCB | CF8 | CF8M | CF3 | CF3M |
2 | Sphere/ Valve Stem | 1Cr13 | 2Cr13 | 1Cr18Ni9 | 1Cr18Ni12Mo2Ti | 00Cr18Ni10 | 00Cr17Ni14Mo2 |
3 | Lining/ Valve Seat | PTFE (F4), PCTFE (F3), FEP (F46), PFA (Soluble F4) | |||||
4 | Packing/ Gland | PTFE (F4) | PTFE (F4) | PTFE (F4) | |||
5 | Packing | 35 | 1Cr17Ni2 | 1Cr17Ni2 | |||
6 | Stud Bolt | ZCuAl10Fe3 | ZCuAl10Fe3 | ZCuAl10Fe3 | |||
7 | Valve Stem Nut | 35 | 1Cr18Ni2 | 1Cr18Ni2 | |||
8 | Retaining Bolt | 35 | 1Cr18Ni2 | 1Cr18Ni2 | |||
9 | Nut | 45 | 0Cr18Ni9 | 0Cr18Ni9 | |||
10 | Handwheel | WCB | WCB | WCB | |||
IV. Main Connection Dimensions:
Nominal Diameter | Standard Value | Reference Value | ||||||||||
DN | NPS | L | D | D1 | D2 | l | b | z-φd | DO | H | H1 | WT (kg) |
(mm) | (inch) | PN0.6MPa | ||||||||||
15 | 1/2 | 130 | 80 | 55 | 40 | 2 | 12 | 4-φ12 | 100 | 100 | 120 | 5 |
20 | 3/4 | 150 | 90 | 65 | 50 | 2 | 14 | 4-φ12 | 100 | 120 | 140 | 8 |
25 | 1 | 160 | 100 | 75 | 60 | 2 | 14 | 4-φ12 | 120 | 130 | 150 | 7 |
32 | 2 3/4 | 180 | 120 | 90 | 70 | 2 | 16 | 4-φ14 | 120 | 156 | 185 | 10 |
40 | 5 1/2 | 240 | 130 | 100 | 80 | 3 | 16 | 4-φ14 | 160 | 165 | 205 | 18 |
50 | 2 | 250 | 140 | 110 | 90 | 3 | 16 | 4-φ14 | 160 | 350 | 400 | 25 |
65 | 10 1/2 | 270 | 160 | 130 | 110 | 3 | 16 | 4-φ14 | 180 | 370 | 435 | 30 |
80 | 3 | 280 | 185 | 150 | 125 | 3 | 18 | 4-φ18 | 180 | 460 | 510 | 43 |
100 | 4 | 300 | 205 | 170 | 145 | 3 | 18 | 4-φ18 | 220 | 495 | 595 | 58 |
125 | 5 | 325 | 235 | 200 | 175 | 3 | 20 | 8-φ18 | 220 | 610 | 735 | 100 |
150 | 6 | 350 | 280 | 225 | 200 | 3 | 20 | 8-φ18 | 240 | 670 | 820 | 115 |
200 | 8 | 400 | 315 | 255 | 225 | 3 | 22 | 8-φ23 | 240 | 815 | 1015 | 145 |
| Machinery & Equipment/Valves/Gate Valves | |
