| Size | DN25-500mm |
| Nominal pressure | PN10-PN42Mpa |
| Body | straight, Angle type, Z type |
Model | Introduction | |
TYP920 | ||
Valve type | TYP300 | CV3000 type |
TYP900 | forged steel sleeve type steam trap valve | |
TYP910 | forged steel labyrinth control valve | |
TYP920 | forged steel cascade throttle control valve | |
FIG580 | 2 ways control valve | |
FIG680 | 3 ways control valve | |
FIG681 | 3 ways bellows sealing control valve | |
JX480 | slide valve | |
Actuator | A | single spring diaphragm type |
B | multi-spring diaphragm type | |
C | single action piston | |
C1 | double action piston | |
D | electric | |
F | electric-hydraulic | |
E | manual | |
G | pneumatic-hydraulic | |
H | other | |
Open/Close type | 1 | air to open type |
2 | air to close type | |
3 | electricity to open | |
4 | electricity to close | |
Action type | A | direct action |
B | reaction | |
Handwheel | 1 | without handwheel |
2 | top mount the handwheel | |
3 | Side mount the handwheel | |
Connection | F | flange |
H1 | butt welding | |
H | socket | |
S | internal thread | |
S1 | external thread | |
J | wafer type | |
K | other | |
Valve trim structure | 1 | shut-off valve |
2 | sleeve single seat valve | |
3 | sleeve double seat valve | |
4 | porous type noise reduction cage | |
5 | labyrinth cage | |
6 | multistage depressurization type cage | |
7 | other | |
Valve core structure | A | balanced internal parts |
B | unbalanced internal parts | |
Valve bonnet type | 1 | standard type |
2 | cooling fin type | |
3 | lengthen type | |
4 | bellow type | |
5 | clamp cover type | |
6 | other | |
Flow characteristic | 1 | quick opening |
2 | linear | |
3 | equal percent | |
4 | fixed percentage | |
Valve seat material | 1 | RPTFE |
2 | alloy steel | |
3 | cemented carbide | |
4 | tungsten steel | |
5 | other | |
Norminal diameter | DN | DN15-DN500 |
Norminal pressure | PN | PN10-PN760 |
LB | 150LB-2500LB | |
K | 5K-60K | |
Material type | 1 | WCB |
2 | WC6 | |
3 | WC9 | |
4 | CF8 | |
5 | CF3 | |
6 | CF8M | |
7 | CF3M | |
8 | A105 | |
9 | F91 | |
10 | F22 | |
11 | other | |
Illustraton | ||
1、TYP300-B-1-A-2-F-2-A-1-3-1-DN50-PN25-CF8 | ||
1.CV3000 series，Multi-spring diaphragm cylinder,air to open type,direct action,top mount the handwheel,sleeve single seat valve,balanced internal parts ,standard valve bonnet,equal percent type,RPTFE valve seat,norminal diameter DN50,norminal pressure PN25,CF8 material. | ||
Cascade type multistage depressurization structure is as shown in figure 1, this structure connects multiple separate throttling band to each other in series instead of original whole throttling band , so that the large pressure difference can be converted into multiple small pressure difference, which makes every decompression range is controlled above the saturated vapor pressure, no cavitations phenomenon exist.
Cascade type regulator is widely used in liquid medium working associations, its characteristic are as blow:
1) It can relieve continuous pressure difference in the process of opening and closing, action of each level throttling mouth lags behind upper level, which can make the continuous high pressure acting valve mouth reduced step by step in opening and closing process and share the pressure in the first class throttling mouth.
2) The flow resistance is small, can be competent for fluid with not high cleanliness, even the solid liquid two phase flow occasion .
3) Cascade type valve core generally is processed with tungsten carbide coating hardening, so anti-scouring cavitation performance is good.
4) Compared with other multistage step-down regulator, manufacturing process technology is relatively simple, easy to machining, low manufacturing costs.
5) Cascade type regulator has generally limited decompression class, mostly is 3 ~ 4, cannot be applied to the occasion with too high pressure difference.
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