... delivery promptly 4.high quality service double ram BOP1Scope of CapabilityFZ18-35 Ram BOP, which is designed and manufactured specially ... time.2Main Structure and PrincipleFZ18-35 Ram BOP has two types: single ram BOP and double ram BOP. It usually adopts top thread ... cylinder bonnet, piston, rod, locking shaft, sealing element and ram assembly and hinge. Its working principle is: the high pressure ...