Dissolving polymers in compatible liquids and uses thereof
Distribution valve and method
Distribution valve and method
Diverter valve assembly
Dosage control apparatus
Dosage control apparatus
Dose system
Dose system
Double block valve with proving system
Double check valve assembly
Double containment fitting
Double disc gate valve
Double solenoid control valve that has a neutral position
Double solenoid valve actuator
Double valve with anti-tiedown capability
Drag reducing agents
Drag reducing composition and method
Drag reduction agent
Drag reduction agent for hydrocarbon liquid
Drag reduction agents for hydrocarbon solutions