Description
Fluid：
Water, Oil
Materials of housing：
Carbon Steel/Stainless Steel
Seal structure：
Multi-springs Balanced Mechanical Seal
Housing connection：
Thread/ Flange
Size:
From 32A to 300A
PN max：
0.8Mpa
Speed max：
1000RPM
T max：
180℃
FEATURES
The Steam Rotary Union is an important part of the steam power industry, making significant contributions to different sectors. The technology is widely used to distribute hot steam from a stationary source to a rotating part. This innovative product is widely used in industrial production to keep the industry running smoothly.
Steam Rotary Union are used in a wide range of applications, such as oil refining, paper making and printing presses. The main purpose of the technology is to heat steam before it enters the rotating machine to prevent it from condensing or freezing. The process of steam rotating the joint helps to reduce the chances of leaks, contamination and equipment damage.
One of the most significant advantages of the steam rotary joint is its ability to efficiently transfer heat in the process. Steam swivel joints are therefore the device of choice for applications that require a high degree of temperature control, such as plastic extrusion, laminating machines and textile processing.
It is also an effective solution for keeping pipes clean, extending equipment life and reducing maintenance costs. The design of the steam swivel allows for smoother operation and reduces the accumulation of clogging and corrosion that can damage equipment.
The steam swivel is reliable and can handle high pressure and high temperature applications. With its precision design, it has the ability to rotate indefinitely without affecting its function. The Steam Spin Alliance can operate at high speeds, making it a preferred solution for a range of industrial applications.
Steam swivel joints are an important part of an industry that relies on steam power technology to keep equipment in top condition. Advantages include enabling heat transfer, keeping pipes clean, and reducing maintenance costs. It is a highly reliable tool that can handle high pressure and high temperature applications while rotating seamlessly. With the continuous improvement of steam rotary joint, it will continue to play an important role in the industrial field, is an indispensable part of industrial production, we are specialized in the production of rotary joint manufacturers, can customize a variety of rotary joint, welcome to buy!
Product Specifications
| Parameter | Range / Options |
|---|---|
| Connection Type | Threaded (NPT, BSP) or flanged |
| Nominal Size (DN) | 15 mm to 100 mm (½″ to 4″) |
| Max. Steam Pressure | 1.0 – 2.0 MPa (10 – 20 bar / 145 – 290 psi) |
| Max. Operating Temperature | Up to 350°C (saturated steam) |
| Max. Rotational Speed | 100 – 500 rpm (depends on size and seal type) |
| Housing Material | Ductile cast iron, carbon steel, or stainless steel (for corrosive environments) |
| Seal Faces | Carbon vs. ceramic / tungsten carbide (self‑lapping) |
| Lubrication | Self‑lubricating design; some models include an external grease port for heavy‑duty use |
| Media Compatibility | Saturated steam, superheated steam, hot water, thermal oil (with compatible seals) |
FAQ
Q: What is the recommended way to mount a steam rotary union to avoid stressing the housing?
A: Always use a flexible metal hose on the stationary inlet side to absorb pipe expansion and vibration. Mount the union with its centreline perfectly aligned to the rotating shaft; rigid piping will cause seal misalignment and premature wear.
Q: Can standard rotary unions operate under vacuum conditions?
A: Yes, but only if it is specifically designed with balanced seals and additional spring loading. Standard positive‑pressure unions may leak air inward under vacuum, so check the supplier's vacuum rating before installing one in a suction or condensing system.
Q: How can I tell the seal faces are wearing out before I see a visible steam leak?
A: Monitor the housing temperature-a gradual rise above normal operating levels often indicates increased friction from worn seals. Also listen for a high‑pitched squeal during rotation; that is a reliable early warning that the carbon face is losing its lapped finish.
Q: Why does the union sometimes run excessively hot even when steam pressure and temperature are within rated limits?
A: The most common cause is insufficient condensate drainage-water pooling in the housing reduces heat transfer and creates localised overheating. Check the siphon pipe and steam trap; also verify that the rotating speed is not too low, which prevents proper seal lubrication.
Q: Can the same rotary joint be used for both steam and thermal oil?
A: Not usually. Thermal oil requires different seal materials (often PTFE‑based) and handles much lower pressures but higher temperatures. Steam unions rely on carbon‑graphite faces that self‑lubricate with moisture; running them dry on oil will quickly damage the seals. Always consult the manufacturer for dual‑media ratings.
DUCUMENTS:
CATALOG
INNSTALLATION INSTRUCTION
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