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- Hydraulically operated actuators with manual backups
- Require 2,000 psi (13.8 MPa) to close/open rams
- Bleed-off/equalizing valve system
- Quick change hydraulic couplers
- Recommended for H2S or where frequent actuation is necessary
- Available in most IDs for 2–15ksi pressure ratings
- IDs over 4 in. (10.2 cm) utilize locking lug hydraulic actuators with guides and rails

| 2.5 in. 5ksi | AM678WB0037 |
| 2.5 in. 10ksi | AM678WB0038 |
| 3 in. 5ksi | AM678WB0002 |
| 3 in. 10ksi | AM678WB0036 |
| 4 in. 5ksi | AM678WB0052 |
| 4 in. 10ksi | AM678WB0048 |
| 5 in. 5ksi | AM678WB0030 |
| 5 in. 10ksi | AM678WB0064 |


