About Us


ACD is an engineering and manufacturing company specializing in machinery designed to operate at cryogenic temperatures as low as – 420 degrees Fahrenheit,  the boiling point of Liquid hydrogen. For over 50 years, ACD has specialized in centrifugal and reciprocating pumps as well as turbines for air separation.  ACD has the most diversified product line in the industry covering nearly every application requiring pumps or turbo expanders.


ACD began in the early 1950’s as an off-shoot of Aerojet General in Southern California manufacturing cryogenic pumps for Oxygen. It was subsequently acquired by an industrial gas company, the Air Research Company “AIRCO” and became the Airco Cryogenic Division “ACD”  which was the manufacturer of cryogenic equipment for the industrial gas parent. AIRCO eventually became BOC Gases and today is known as Linde; ACD was acquired by the Cryogenic Industries Group of Companies and today continues to operate as “ACD”.

By the early 1970’s, ACD had already outfitted entire fleets of LNG carriers with spray, emergency and main cargo pumps, warm up and boil off compressors and warm up heat exchangers. Over 100 carriers utilized ACD LNG equipment.


Since the inception of the company, ACD has been a trusted supplier of equipment to some of the most prestigious companies in the world in some of their most delicate applications.


Quality System Certification

ACD LLC  is an ISO 9001 certified company.  Our current certificate is valid until October 19, 2021.

ACD Quality System Documents Program

This ACD program is focused on maintenance and further improvement of document and record control processes:

ACD quality system documents

Quality Control Work Processes

With 50 + years in manufacturing business, ACD LLC has strongly established quality control work and continual improvement processes.

With further development of our NCR, FTR and CAPA systems, we are also focused on providing products to customers that meet or exceed their requirements.  Requirements such as desirable weld quality, non-destructive testing and material traceability.

  • ACD’s Supplier Selection and Evaluation Process are defined by two procedures:
    • Procedure POP-003 General Purchasing Procedure
    • Procedure QOP-005 Supplier Quality Evaluation
  • When suppliers are considered for ACD they must complete a Supply Survey.
  • Purchasing and Quality review the responses on the survey and determine if additional actions or information are required, including facility audit, in compliance with ISO requirements.
  • We require our Supplier to submit a First Article part along with their First Article Inspection Report, as part of our First Piece Verification Process.
  • We verify that the First Article complies with the engineering drawing and specification requirements, by our In-House Inspectors.
    • We maintain an Approved Supplier List reflecting the current status of the supplier.
  • We monitor the performance of our Suppliers on an ongoing basis. Those Suppliers, which Purchasing has identified as “Critical Suppliers”, are assigned with a Performance Scorecard, which are prepared by the Buyers and presented to the ACD Leadership team on a monthly basis.


  • State-of-the-art CNC 5-axis machining and turning centersACD Quality - 4 points logo - resized
  • Oxygen Clean room Audited by all the major industrial gas companies worldwide
  • High vacuum equipment
  • Dynamic balancing per QSO 1940 G2.5
  • Certified welding
  • Global sourcing and streamlined assembly for lower product costs without compromising high quality standards
  • Fully instrumented inspection rooms at two facilities


ACD is committed to conducting its business fairly and impartially , in an ethical and proper manner, and in accordance with the Company’s values and formalized Policy on Business Conduct. Building a culture with such standards of integrity in today’s complex business atmosphere requires a high level of commitment in every area of operations. Company employees, consultants, representatives and agents are all required to use sound business judgment, to adhere to ACD’s ethical and moral standards, and to avoid all conflicts of interest. Their efforts are backed by comprehensive policies, communications, and training, all working together to achieve the Company’s goals of integrity and propriety. All employees must sign and abide by the Policy on Business Conduct. They have the responsibility to ask questions, seek guidance and report suspected violations of this Policy.

ACD, LLC takes your privacy seriously. Click here for our Privacy Policy for General Data Protection Regulation (GDPR). For questions regarding our Privacy Policy, please contact us at info@cryoind.com.