Texsteam Series 3700 Gas/Pneumatic Driven Injection Pumps are designed for handling many types of aqueous solutions and other chemicals. Single or double-headed units with three volume adjustments are available in a wide variety of models. Injection pressure to 1500 psi can be achieved with air or gas pressure as low as 50 psi. Units can be furnished with or without reservoirs (5 or 10 gallon. Other sizes available upon request). Texsteam 3700 injectors feature a unitized gas motor and pump. The gas motor operates in an enclosed oil bath.