Details Explanation
ZMQSY/ZDLSYseriesPneumatic/ElectricY-shaped drain valveThis is a new generation of steam trap valve developed, designed and produced by our company based on the drainage of thermal power plant equipment. The product has a nearly linear flow design, reduces flow resistance, secondary throttling principle, reduces erosion, and improves service life. The valve core and seat are made of solid hard alloy, with a closed internal leakage of ≤ Grade VI. The valve seat has a compression type structure, a detachable middle chamber sealing design, which prevents external leakage and is easy to maintain. It can also be used in flammable and explosive environments. According to the signal from the control system or regulating instrument, the valve can be cut off or opened to meet the requirements of the controlled parameters. Therefore, it is widely used for remote control in industries such as thermal power plants.
Body structure diagram
| Serial Number | Part name | Common materials |
| 1 | Valve body | WCB、WC6、WC9 |
| 2 | Valve seat | 304, 316+Stellite alloy, Stellite alloy |
| 3 | Valve core | 304, 316+Stellite alloy, Stellite alloy |
| 4 | Valve cage | 304, 316 |
| 5 | Valve stem | 304, 316 |
| 6 | Valve cover | WCB、WC6、WC9 |
| 7 | Packing material | Flexible graphite |
| 8 | Packing gland | 304 |
| 9 | hold-down grid | 304 |
| 10 | Double headed stud | 35CrMo |
Specifications and technical parameters
| Nominal diameter DN (mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | |
| Rated flow coefficient Kv | 5 | 8 | 12 | 17 | 29 | 43 | 70 | 110 | |
| Rated travel L (mm) | 20 | 30 | |||||||
| Model of actuator | ZM10-1 | ZM10-2 | ZM10-2/ZM10-3 | ||||||
| Effective area of membrane (cm)2） | 210 | 320 | 320/720 | ||||||
| Nominal pressure PN | PN16、40、64、100（150lb、300lb、600lb） | ||||||||
| Inherent flow characteristics | Quick open | ||||||||
| Gas source pressure (MPa) | 0.4～0.6 | ||||||||
| electric actuator | Select based on the required thrust and stroke of the valve | ||||||||
| supply voltage | 220V. AC 50Hz 380V AC 50Hz (three-phase) | ||||||||
| Working temperature t (℃) | Standard type | -20～220℃ | |||||||
| Heat dissipation type | Carbon steel: -20~425 ℃, chromium molybdenum steel:- 20～550℃ | ||||||||
| Leakage level | ≤ Grade VI | ||||||||
| Connection form | Welding type | ||||||||
| optional accessories | Positioner, air filter pressure reducer, solenoid valve, limit switch, handwheel (side mounted) | ||||||||
Note: 1. Special requirements can be produced according to customer specifications.
Main performance indicators
| Serial Number | project | Standard intelligent valve | Heat dissipation, low-temperature intelligent valve |
| 1 | Basic error<(%) | ±1 | ±2.5 |
| 2 | Return difference<(%) | 1 | 2.5 |
| 3 | Dead zone<(%) | 0.4 | 1 |
| 4 | Constant point deviation<(%) | ±1 | ±2.5 |
| 5 | Rated travel deviation ＜ (%) | +2.5 | +2.5 |
Note: The performance indicators of this product are higher than GB/T4213-2008.
Technical parameters of the executing mechanism
The ZM10 series pneumatic multi spring actuator adopts a modular design, so it only needs to be disassembled and assembled locally to achieve the conversion between the two modes of action of air opening and air closing. The gas path connection between the actuator and the valve positioner adopts an internal connection combination, and the gas discharged from the positioner can be injected into one side of the spring chamber to generate a pressure slightly higher than the atmospheric pressure of the external environment, so as to prevent corrosive gases from the external environment from being sucked in and corroding the spring and other components.
Gas Open (FC): When the gas source fails, the actuator spring closes the valve.
| model | Membrane area (cm)2) | Number of springs | Travel distance (mm) | Spring range (KPa) | Thrust (KN) |
| ZM10-1 | 210 | 3 | 20 | 75 ～ 150 | 1.6 |
| 6 | 150 ～ 300 | 3.2 | |||
| ZM10-2 | 320 | 3 | 30 | 75 ～ 150 | 2.4 |
| 6 | 150 ～ 300 | 4.8 | |||
| ZM10-3 | 720 | 6 | 30 | 150 ～ 225 | 10 |
| 9 | 180 ～ 270 | 13 | |||
| 12 | 220 ～ 330 | 16 |
Air shut-off (FO): When the air source fails, the actuator spring opens the valve.
| model |
Membrane area (cm2) |
Number of springs |
trip (mm) |
Spring range (KPa) | Thrust (KN) Gas supply pressure (MPa) | ||||
| 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | |||||
| ZM10-1 | 210 | 3 | 20 | 75 ～ 150 | 1.0 | 3.2 | 5.2 | 7.2 | 9.4 |
| 6 | 150 ～ 300 | – | – | 2.1 | 4.2 | 6.3 | |||
| ZM10-2 | 320 | 3 | 30 | 75 ～ 150 | 1.6 | 4.8 | 8.0 | 11.2 | 14.4 |
| 6 | 150 ～ 300 | – | – | 3.2 | 6.4 | 9.6 | |||
| ZM10-3 | 720 | 3 | 30 | 75 ～ 113 | 6.3 | 13.5 | 20.6 | 27.9 | – |
| 6 | 150 ～ 225 | – | – | 12.6 | 19.8 | 27 | |||
Main technical parameters of electric actuator
| Basic model | Output thrust (KN) | Stroke | Technical Parameter |
| PSL202 | 2.0 | 50 |
Power Supply: AC220V 50HZ
Protection level: IP67
Input signal: 4-20mA
Output signal: 4-20mA |
| PSL204 | 4.0 | 50 | |
| PSL208 | 8.0 | 50 | |
| PSL210 | 10.0 | 50 | |
| PSL312 | 12.0 | 50 | |
| PSL320 | 20.0 | 50 |
Temperature and pressure range for the use of valve body and internal components materials
