· Control accuracy < 0.1% F.S.
· Full stroke time < 5s 
· Shutoff thrust：85000N
· Fail power lock

· Control accuracy < 0.1% F.S.
· Repeatability < 0.1% F.S.
· Sensitivity < 0.05% F.S.
· Overshoot < 0.5% F.S.
· Response time < 30ms
· Full stroke time < 1s
· Fail power/pressure/signal spring return close
·  Redundancy feedback
· Viton seal rings

· Control accuracy < 0.1% F.S.
· Full stroke time < 1s
· Fail power/pressure/signal spring return close

· Control accuracy < 0.1% F.S.
· Quick close time < 0.25s
· Fail power/pressure/signal spring return close
· Redundancy feedback
· Two close switch and one open switch
· Viton seal rings
· Safety oil control

· Control accuracy < 0.15% F.S.
· Repeatability < 0.15% F.S.
· Sensitivity < 0.15% F.S.
· Response time < 100 ms
· Fail power lock

· Control accuracy < 0.1% F.S.
· Repeatability < 0.1% F.S.
· Sensitivity < 0.05% F.S.
· Response time < 30ms
· Full stroke time < 2s
· Fail power lock

· Control accuracy <0.1% F.S.
· Repeatability <0.1% F.S.
· Sensitivity <0.05% F.S.
· Response time <3s
· Quick Open time <1.5s
· Fail power/pressure/signal spring return open

· Control accuracy < 0.1% F.S.
· Repeatability < 0.1% F.S.
· Sensitivity < 0.05% F.S.
· Full stroke time < 5s
· Fail power lock
· Explosion proof class: Exd IIC T4