Cryostar cryogenic equipment

Selecting a Cryostar pump family

Start with the process duty: cylinder filling, road tanker loading, liquid transfer or continuous service in an air separation plant. Specify the handled liquid, required flow and inlet and outlet pressures. These inputs establish which pump family and installation arrangement should be considered.

The published maximum figures describe a family envelope. They do not mean that every pump reaches the maximum flow and maximum pressure simultaneously. For several operating modes, provide a duty table and identify the normal operating point as well as occasional requirements.

Nameplates, serial numbers and drawings

Provide clear photographs of the pump nameplate and the complete assembly. Photograph the motor nameplate separately. Keep all model suffixes and serial numbers; a designation such as A-SDPD 30/20-T contains more useful identification than the SDPD family name alone.

An assembly drawing connects the requested part to a particular machine configuration. Mark the drawing position and include the associated parts list. If the label is damaged, send the installation records and photographs of visible markings on the assembly or component.

For multiple machines, assign a separate line to each serial number. Link photographs to the corresponding line so similar looking units remain identifiable. Measurements can support identification, especially for an unmarked component, but should accompany the available manufacturer documentation.

Cold ends, drives and installation

For a reciprocating pump, distinguish the cold end, the drive and the complete pumping unit. State whether the existing motor will be retained. A valve or seal enquiry should include the assembly reference and the position of the component in the parts list.

For centrifugal equipment, specify connections, mounting orientation and the installed seal arrangement. Warm box and cold box configurations should remain explicitly identified. For a submerged pump, include vessel installation details and explain how the existing pump is connected and removed.

List the requested equipment and the items that the site will retain. This can include the motor, support, pipe connections or control equipment. A defined scope makes it easier to compare a replacement assembly with a complete pump proposal and assess the work required at the installation.

Medium and operating conditions

Identify the liquid or gas and its composition, temperature and pressure conditions. Keep the medium description from the plant specification, including any relevant operating stages. State whether the equipment serves oxygen, nitrogen, argon, carbon dioxide or another defined process stream.

For gas equipment, provide the process specification and required inlet and outlet conditions. A BOG compressor enquiry should describe the boil off gas duty and its connection to the wider system. A turboexpander enquiry should identify the associated brake or generator arrangement.

Replacement parts and maintenance kits

Cryostar lists individual replacement parts and kits. Send the machine type, serial number, part number, description and quantity for each position. If a kit is required, include its designation and the documented list of components rather than requesting a general set of seals.

For a worn component, photographs of markings and mating surfaces can help clarify the enquiry. Identify whether the request concerns a complete valve assembly, an individual element, a seal or another listed part. Keep the original code even when the site uses a different everyday name.

Separate components for an immediate repair from spare stock for later maintenance. Indicate the required receiving date and whether partial deliveries are useful.

The equipment owner plans maintenance work under its operating documentation; a manufacturer service request needs its own defined scope.

A Cryostar component we have quoted

Our enquiry history includes a quotation calculation for a Cryostar check valve, part number 740101130, for an A-SDPD 30/20-T pump. The example illustrates how a complete pump designation and a part number define a specific procurement position.

For the same reference or a neighbouring assembly, provide the nameplate and parts list for your own machine. List the quantity and associate every requested component with the machine to which it belongs.

Preparing a complete equipment enquiry

For a new installation, send the technical specification, process duty, installation arrangement and required package scope. For replacement equipment, include records of the existing machine and state which dimensions, connections and operating conditions must be preserved.

List the main equipment, auxiliary systems, spare assemblies and documents separately. Compander packages and compressor units can involve drive, lubrication, seal gas and instrumentation requirements. Identify which systems are included in the enquiry and which are provided by the site.

Include a technical contact who can confirm the configuration against the actual plant conditions. A common requirement table makes alternative proposals easier to compare. Once the technical scope is defined, specify quantities, delivery destination and the required commercial documents.

Multi item orders and receiving checks

Use one table with a separate line for each model or part. Useful columns are equipment, serial number, part number, description, quantity and photograph reference. State common project requirements once and add individual exceptions to the relevant machine line.

Before ordering, compare the agreed specification with the original equipment list. At receipt, check identification, quantities and package contents against that specification.

Keep component markings connected to the relevant machine records so parts can be assigned to the intended maintenance task.