ASTM A216-WCB Thermodynamic Type Steam Trap For Steam Pipeline Use
Product introduction:
Thermodynamic steam trap is currently the most commonly used type
of drain valve in thermal system devices. It has the advantages of
small size, light weight, large drainage capacity, and easy
installation and maintenance.
The thermodynamic steam trap valve is mainly composed of valve
body, valve cover, valve disc, air isolation (insulation) cover,
filter screen, and filter holder. The only operating component of a
thermodynamic steam trap is the valve plate. The operating
principle is based on Bernoulli's law and the physical
characteristics of steam and condensed water. By discharging
drilling water, the dynamic and static pressures acting on the
valve plate are changed to open and close the valve plate.
Product component and performance:
| Working Pressure | 0.05-6.4MPa | Max working temperature | 325℃ |
| Port size | DN15-DN150 | Leakage rate | <3% of actual displacement |
| Under-cooling | 8 ℃ | Max back pressure | 50% |
| Body & bonnet | WCB, CF8 | Disc plate | 2Cr13, CF8 |
| Seat | 2Cr13, CF8 | Filter | CF8 |
Product application:
1. Advantages:
- Simple and compact structure: lightweight, with only one movable
valve plate inside, easy to maintain, and can be repaired without
removing it from the pipeline.
- Widely applicable: can be used for high-pressure and superheated
steam, resistant to water hammer and vibration, stainless steel
structure resistant to condensation water corrosion.
- Good energy-saving effect: It can block the direct discharge of
steam, save heat conversion in the steam system, and achieve
energy-saving goals.
- Easy installation: The installation method is not limited and can
be installed freely without the need to build a water tank or
storage tank, saving civil engineering investment.
- Long service life: The internal key components are made of
stainless steel and other materials, which are corrosion-resistant.
The spring force can be adjusted as needed to extend the service
life.
- Stable and reliable operation: The main components have strong
anti-interference ability, high stability, few faults, and can
achieve online maintenance.
- Good environmental performance: No need for external energy, no
pollution emissions, and no secondary pollution to the environment.
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2. Disadvantages:
- Large steam waste: The working power comes from steam, and there
is a certain amount of steam waste.
- Loud noise: It produces noise during work and is not suitable for
places with high quiet requirements, but a muffler can be installed
to reduce noise.
- Relatively short service life: The valve disc works frequently
and has a short service life.
- The working pressure range is limited: it cannot work under low
pressure difference, the inlet pressure is generally not less than
0.25 bar g, and the back pressure cannot exceed 80% of the inlet
pressure.
- During the start-up phase, there may be limitations: if the inlet
pressure increases rapidly and the air flow rate is too fast, air
resistance may form. It is necessary to install a thermal static
exhaust valve in parallel or choose a drain valve with a built-in
anti air resistance disc.
In summary, thermal power drain valves have the advantages of
simple structure, easy maintenance, and wide applicability.
However, they also have disadvantages such as steam waste and high
noise. When choosing to use them, it is necessary to consider the
specific working conditions and needs comprehensively.
