PORO manufactures cryogenic check valves designed for LNG, industrial gas, and low-temperature fluid systems where reliable one-way flow control is required.
Technical Specifications
|
Item |
Specification |
|
Product Type |
Cryogenic Check Valve / Cryogenic Non-Return Valve |
|
Valve Design |
Swing Check Valve / Lift Check Valve |
|
Nominal Size |
DN15–DN600 |
|
Pressure Rating |
Class 150–2500 / PN10–PN420 |
|
Minimum Design Temperature |
Down to −196°C, subject to material and configuration review |
|
End Connection |
Flanged End / Butt-Weld End |
|
Seat Configuration |
Soft Seat / Metal Seat |
|
Installation |
Horizontal or vertical installation according to valve design and flow direction |
|
Body Materials |
Low-Temperature Carbon Steel, Stainless Steel, Duplex Stainless Steel, Alloy Steel and other approved materials |
|
Applicable Standards |
ANSI, DIN, BS, JIS and GB systems where applicable |
|
Inspection |
Material verification, dimensional inspection, pressure testing, leakage testing and functional inspection |
|
Documentation |
Supplied according to approved order requirements and project specifications |
Valve Configuration Selection
Swing Check Valve
Recommended for applications requiring a simple flow path and relatively low pressure loss. Selection should consider flow velocity, pipe orientation, closing response and the possibility of disc slam.
Lift Check Valve
Suitable for applications requiring guided closing movement and controlled seating. Correct operation depends on installation direction, differential pressure and minimum available flow.
Seat Selection
Metal seats are commonly selected for demanding temperature, pressure and service conditions. Soft-seat availability depends on the medium, operating temperature, pressure rating and required leakage performance.
Material Selection
Body, disc, seat, pin, guide, bolting and gasket materials are reviewed as a complete assembly. Minimum temperature, corrosion resistance, mechanical strength and thermal contraction must all be considered.
Key Features
Stable Low-Temperature Operation
Materials, clearances and internal components are selected to support reliable movement during cooling, operation and temperature recovery.
Automatic Reverse-Flow Protection
The disc or closure element responds to changing flow conditions without an external actuator, reducing the risk of pressure return and reverse circulation.
Application-Specific Sealing
Seat construction is matched to the required temperature, medium and shut-off performance instead of applying one sealing design to every service condition.
Typical Applications
LNG Storage and Transfer
Installed in tank connections and transfer lines to prevent reverse flow during loading, unloading and system shutdown.
Industrial Gas Processing
Used in low-temperature production, separation, distribution and supply systems where fluid direction must remain controlled.
Cryogenic Pump Discharge
Protects pump lines from pressure return, reverse rotation and downstream fluid movement after pump shutdown.
Low-Temperature Process Equipment
Applied in process skids, heat-exchange systems and equipment connections where backflow could disturb operation.
Vacuum-Insulated Piping
Maintains the intended flow direction in insulated transfer networks while supporting compact cryogenic system layouts.
Manufacturing Process
Material Preparation
Approved materials are identified and released for production against the confirmed bill of materials.
Precision Machining
Bodies, discs, seats, pins, hinge parts and guides are machined to specified dimensions and surface requirements.
Component Preparation
Sealing surfaces, moving parts and mating components are prepared for assembly.
Controlled Assembly
Internal parts are installed in the required flow direction and adjusted for correct alignment, movement and seat contact.
Production Completion
The assembled valve is cleaned, marked and prepared for final verification.
Packing and Dispatch
Approved valves receive suitable end protection and export packing before shipment.
Manufacturing Capability
Highly experienced
Established in 1997, PORO provides over 25 years of experience in industrial valve manufacturing for global industrial applications.
Quality Control & Inspection
Covering material verification, machining inspection, assembly checks, and final inspection to ensure product consistency and traceability.
Comprehensive Valve Manufacturing Range
Producing gate valves, globe valves, check valves, ball valves, butterfly valves, slab gate valves, and forged valves for different pipeline systems.
Multi-Material & Standard Capability
Supporting carbon steel, LTCS, stainless steel, duplex stainless steel, and alloy steel materials according to ANSI, DIN, BS, JIS, and GB standards.
FAQ
Q: Can PORO manufacture valves to customer drawings?
A: Yes. Customer drawings can be reviewed for manufacturability before order confirmation.
Q: Can one purchase order include different sizes and valve types?
A: Yes. Mixed product requirements can be coordinated under one purchase order.
Q: Are approval drawings available before production?
A: They can be submitted when drawing approval is included in the order requirements.
Q: When does production begin?
A: Production begins after commercial confirmation and completion of the agreed technical release process.
Q: Can specifications be revised after order placement?
A: Revisions can be reviewed before manufacturing release. Later changes may affect price and delivery.
Q: What factors influence delivery time?
A: Material availability, configuration complexity, order quantity, approval progress and inspection arrangements affect the schedule.
Q: Can third-party inspection be arranged?
A: Yes. The inspection scope and witnessing points should be defined before production.
Q: Can replacement parts be ordered separately?
A: Yes. The original valve model, serial information or order reference should be provided.
Q: How are valves prepared for international shipment?
A: Valves are protected, identified and packed according to product condition, transport method and contractual requirements.
Q: Is technical support available after delivery?
A: PORO can assist with product identification, document clarification, installation questions and reported quality issues.
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