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■EPDT-292■
7. Operation procedure
7.1 Warning and caution for operation
Warning
1. Do not touch the product by bare hands when steam is flowing.
* Failure to follow this notice may cause burn or injury.
2. Confirm that pipe joints are connected firmly and not unstable before letting the steam flow.
* Failure to follow this notice may cause blowout of steam or condensate, resulting in scalds.
Caution
1.
Open stop valves on pipes slowly to prevent water hammer.
* Sudden opening of stop valves may cause hunting or water hammer, damaging the devices.
2.
The product is activated by driving pressure. If driving pressure is lower than back pressure on the
outlet side, condensate continues to flow into the product and the product is filled with condensate. In
this state, driving pressure port is blocked by condensate and condensate cannot be pushed out by
driving pressure. Therefore, if driving fluid is steam, be sure to confirm that sufficient pressure exists in
driving steam line using pressure gauge G1 before start of operation.
(See 6.1. Piping example.)
* Actions to be taken when the product is filled with condensate fully
Close valve V1 on driving steam line and valve V2 at condensate inlet first, and then open blow valve
V5 at the bottom of the product for drainage.
(See 6.1. Piping example.)
3. The most appropriate value of driving pressure is back pressure at outlet side + 0.1 to 0.2 MPa.
* Enlarged differential pressure leads to cause water hammer.
7.2 Operation method
<Open system>
See Fig. 5 for marks and numbers of stop valves. Stop operation immediately when water
hammer occurs, and close operating stop valves.
1: Open stop valve V4 at condensate outlet slowly until it is full open.
2: Open stop valve V3 at vent port slowly until it is full open.
3: Open stop valve V1 at driving fluid port slowly until it is full open.
4: Confirm by pressure gauge G1 that driving pressure is sufficient, and then open stop valve
V2 at condensate inlet slowly until it is full open.
5: If the product is activated and transfer of condensate is confirmed through sight glass 11,
startup of operation is completed.
<Closed system>
See Fig. 6 for marks and numbers of stop valves. Stop operation immediately when water
hammer occurs, and close operating stop valves.
1: Open stop valve V4 at condensate outlet slowly until it is full open.
2: Open stop valve V3 on pressure equalizer (pipe at vent port) slowly until it is full open.
3: Open stop valve V1 at driving fluid port slowly until it is full open.
4: Open stop valve V6 slowly until it is full open for air ventilation from pipe at condensate
inlet by air vent.
5: Confirm by pressure gauge G1 that driving pressure is sufficient, and then open stop valve
V2 at condensate inlet slowly until it is full open.
6: If the product is activated and transfer of condensate is confirmed through sight glass 11,
startup of operation is completed.
