Our Divisions
At Chas G. Allen, our strength lies in our specialized divisions, each focused on delivering precision, performance, and service across a range of industrial needs. From custom-engineered pump solutions to high-precision machining and surface grinding, our divisions work together to support customers across industries with the quality and craftsmanship they’ve trusted for over 75 years.
Allen Pump
Engineered Pump Solutions
Allen Pump specializes in turnkey pump services, from installation and removal to expert repair, laser alignment, dynamic balancing, and seal changeouts. We serve municipalities, utilities, and private industry with reliable field services and shop repair capabilities backed by decades of experience.
Harper
Custom Machine Design & Engineering
Harper delivers custom automation and precision machinery for manufacturing applications. Our engineers design and build complex mechanical systems tailored to your production needs—delivering performance, durability, and support you can count on.
L.A. Simpson
High-Precision Machining Services
L.A. Simpson is known for high-precision machining for demanding industries including Aerospace, Military, and Nuclear. Our AS9100D-certified facility provides tight-tolerance machining, complex part manufacturing, and quality assurance that meets the highest standards.