Product overview
The PHA pneumatic diaphragm actuator is a new pneumatic thin diaphragm actuator designed and developed for the problems based on the problems of old single spring pneumatic diaphragm actuator (such as large size, being heavy and unreliable deep corrugated diaphragm), and its membrane cover plate, limiting piece and other parts are of steel plate punch forming. The diaphragm form is complex, and the special compacting technology is used to make the bursting strength exceed 22kg/cm2. The multiple spring form improves the manufacturability of the spring manufacturing and facilitates the combination of different spring ranges. The adjustable zero function improves the linear precision. The epoxy electrostatic powder is sprayed for surface treatment which is of high fastness and corrosion resistance. It has the advantages, such as uniform stress, good stability, small size and light weight. It can be equipped with such accessories as pneumatic and electrical valve positioner and air filter.
Technical parameters
Part name | Material | Part name | Material |
Upper and lower membrane cover | Steel plate | Holder | HT200,ZMXA/B-6O ZG250-450 |
Convoluted diaphragm | Nitrile butadiene rubber with nylon | Sealing ring for shaft | Polyurethane (used for reaction) |
Balance spring | 60Si2MnA | Push rod | 2Cr13 |
Product model selection
Model | PHA110 | PHA220 | PHA230 | PHA340 | PHA450 | PHA560 |
Travel (mm) | 10 | 10 and 16 | 16 and 25 | 40 | 40 and 60 | 100 |
Effective area (cm) | 200 | 350 | 350 | 560 | 960 | 1600 |
Air source port size | M10x1 | M12x1.25 | M16x1.5 | |||
Air source pressure | 0.14 and 0.25MPa | |||||
Ambient temperature | -30～60℃ | |||||
Spring scope | 0.02～0.10, 0.04～0.10 and 0.08～0.24MPa | |||||
Performance index
Item | With locator | Without locator |
Intrinsic error ％ | ≤±1 | ≤±4 (Percentage representation of output stroke) |
Return difference ％ | ≤1 | ≤2.5 (Percentage representation of output stroke) |
Dead band error ％ | ≤0.8 | ≤2.5(Percentage representation of output pressure scope) |
Rated travel deviation ％ | ≤±1 | ±2.5 |
Starting/ending point deviation ％ | ±0.1 | ±2.5 |
Zero transfer volume ％ | ±20 | |
Membrane compression strength MPa | 20～24 | |
Working life | Not less than 0.3 million times | |
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