Reference documents are available that will help you select the suitable type of hydraulic device.
| Product characteristics | EOP | COP | HOP | SOP |
|---|---|---|---|---|
| Torque | Intermediate | Intermediate | Large | Intermediate |
| Explosion-proof | Available | Available | Not available | Available (Note 1) |
| Reliability | Suitable for highly frequent operation | Suitable for highly frequent operation | Electronic control part separated from oil tank | Suitable for highly frequent operation |
| On-site installation of electronic device | Unnecessary | Unnecessary | Necessary | Unnecessary (Note 2) |
| Retention power of valve opening position | Yes (Note 3) | Yes (Note 3) | Option (Note 4) | Yes (Note 3) |
| High level of accuracy | Available | Not available | Available | Available |
| Operating speed | 12 – 45 sec. | 12 – 45 sec. | 8 – 64 sec. | 12 – 45 sec. |
| Wiring work | Normal | Simple | Normal | Wiring required for servo amplifier and displacement transmitter |
| Independent control | Not available | Available | Not available | Not available |
| Configuration of servo system | Available | Not available | Available | Available |
| Maintenance service | Normal | Easy | Easy and timely | Normal |
| Outdoor installation | Standard | Standard | Standard | Standard |
| Energy efficient | Not available. Continuous full-load operation | Same as on the left | Power down when not in use (unload) | Not available. Continuous full-load operation |
| Resource efficient | Stain-proof against hydraulic oil and long-lasting (Note5) | Stain-proof against hydraulic oil and long-lasting (Note5) | Deterioration-proof hydraulic oil and long-lasting | Stain-proof against hydraulic oil and long-lasting (Note5) |
| Response to operational change | Easy (Note 6) | Hydraulic oil piping to be modified | Easy change of operative direction and reversal of open degree signal | Easy (Note 6) |
| Control method | Jet pipe type | Independent control type | Electromagnetic valve type | Jet pipe type |
Note 1: The servo amplifier must be mounted on a control panel installed in a non-explosion protected area.
Note 2: The displacement transmitter with built-in potentiometer for position detection must be installed at the position of cylinder.
Note 3: If a hydraulic resource is present the cylinder can be constantly pressurized in retaining the open position. That retention in the absence of a hydraulic resource, however, can still be optionally supported.
Note 4: Retention by pilot check valve (option)
Note 5: Hydraulic oil deteriorates faster than HOP because of constant full-load operation, but its resistance against deterioration is high.
Note 6: If additional devices such as an MGV (electromagnetic valve) and EP (emergency operation device) are utilized the hydraulic pressure piping must be modified.
The documents are currently being prepared.