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Small pressure drop loss, high flow capacity, precise maintenance, convenient long neck type upper valve cover, PD series pneumatic low-temperature regulating valve
from China
Product Description
The PD series pneumatic low-temperature regulating valve produced by our company has the advantages of S-shaped flow channel, low pressure drop loss, high flow capacity, precise flow characteristics, and easy maintenance. It is a variant product of a single seat regulating valve. It differs from the ambient temperature regulating valve in that it uses a long necked upper valve cover to keep the packing working at room temperature. Suitable for regulating media (such as liquid oxygen, liquid nitrogen, etc.) at ultra-low temperatures ranging from -60 to -196 ℃. To ensure adjustment accuracy, an electrical valve positioner must be used. Widely used in industries such as petroleum, chemical, pharmaceutical, and air separation.
Specification parameters
| Nominal diameter | DN15~DN200 |
| Nominal pressure | PN1.0~PN2.5 Class150 |
| Working temperature range | -196℃~200℃ |
| Connection method | Flange style Welded type |
| Body material | CF8 CF8M CF3M LF4 LF2 |
| Material of valve internals | 304 304+STL 316 316+STL 316L 316L+STL |
| Valve cover form | Elongate type Bellows sealed type |
| Traffic characteristics | Equal percentage line |
| Leakage level | Hard seal level IV, V,soft seal level VI (standard ANSI B16.104) |
| Diaphragm actuator | PZM200 PZM280 PZM400 PZM600 PZM1000 PZM1600 |
| Spring range and gas source | 40-200KPa (gas source 0.25MPa) 80-240KPa (gas source 0.3MPa) |
| Input signal | 4-20mA.DC |
