Selecting the right seal starts with where it will be used. Donghang organizes its full gasket and packing range by the equipment and process you need to seal — from shell-and-tube heat exchangers and raised-face flanges to pipelines, pumps, valves, boilers, reactors, and harsh oil & gas or chemical services.
Each application hub below lists the recommended gasket types, compatible materials, governing standards (ASME B16.20, API 6A, DIN, EN, JIS), and practical selection guidance. Whether you need a spiral wound gasket for a heat exchanger or an RTJ ring joint for a wellhead, find the right sealing solution by application and request a quote tailored to your operating conditions. With in-house manufacturing, material certification and fast lead times, Donghang supports projects from single prototypes to bulk OEM supply.
What type of gasket is best for high temperature applications?
For service above 400°C, graphite-filled spiral wound gaskets or metal jacketed / kammprofile gaskets are recommended due to their heat resistance and anti-creep properties.
How do I choose a gasket for a flange?
Base the choice on temperature/pressure rating, media compatibility and flange facing type, then match the standard (ASME B16.20, EN 1514, etc.) and gasket style (spiral wound, ring joint, soft cut).
What is the difference between a spiral wound and a kammprofile gasket?
Spiral wound gaskets use alternating metal and filler windings; kammprofile gaskets use a grooved metal core with a soft facing layer and can be re-used by replacing the facing.
Do you supply gaskets by application or by material?
Both. Donghang organizes products by application (this hub), by material, and by standard so you can enter from the angle that fits your project.
Can gaskets be supplied to ASME, API, DIN or JIS standards?
Yes, we provide professional installation services to ensure your cabinets are installed correctly and efficiently. Our experienced installers will handle the entire process, from delivery to final adjustments, ensuring a perfect fit and finish. If you prefer to install the cabinets yourself, we also offer detailed installation guides and support.
What is gland packing versus a gasket?
A gasket seals a static joint (e.g., flange); gland packing seals a rotating or reciprocating shaft (pump/valve stem). They solve different leakage paths.
How to prevent heat exchanger gasket leakage?
Use the correct inner-ring spiral wound style, verify pass-partition (bridge) widths, control bolt load evenly, and select graphite filler for thermal cycling.
Do you provide non-asbestos and food-grade sealing products?
Yes. We offer a full non-asbestos sheet range and FDA-grade PTFE sheets / sanitary gaskets for food, beverage and pharma applications.
