DN250/DN250300 FF Heavy-Duty High-Speed Rotary Joint

Short Description:

DN250/DN300 FF Series High-Capacity Rotary Union

1.6MPa | 3200kg Load | Water/Oil/Gas

Key Features & Benefits:

Superior Load-Bearing Design: With an exceptional axial load capacity of 3,200 kg, this joint is built with robust bearings and a rigid housing to support the weight of connected piping and equipment, ensuring stable operation and long service life under heavy loads.
Versatile Media Compatibility: Sealed and constructed from high-grade materials to reliably handle Water, Hydraulic Oil, Compressed Air, and other Gases, offering flexibility for various industrial processes.
Robust Performance Parameters: Operates seamlessly under pressures up to 1.6 MPa and across a wide temperature range from -40°C to +120°C, making it suitable for diverse climates and operating conditions.
Precision for Low-Speed Applications: Optimized for smooth, leak-free operation at low rotational speeds (0-30 RPM), perfect for large dryers, calenders, mixers, and other slow-turning heavy equipment.
Flange-to-Flange Connection: Features sturdy, standardized flanges (FF) for a secure, bolted connection that is easy to install, maintain, and provides excellent resistance to piping stress.
Durable Construction: Precision-engineered components and high-quality seals minimize wear, reduce maintenance needs, and prevent costly fluid leaks, protecting your production line and environment.

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Product Detail

Product Tags

Maximize efficiency and reliability in your heavy-duty rotating machinery with our DN250 Flange-to-Flange Rotating Joint. Engineered for demanding industrial environments, this large-bore union is the ultimate solution for leak-free transfer of water, oil, or gas from a stationary pipe into a slowly rotating drum, roller, or cylinder. Built to withstand massive axial loads and deliver consistent performance, it is the ideal choice for large-scale papermaking, steel processing, rubber & plastic manufacturing, and other critical applications where downtime is not an option.

Ideal Applications:

This rotating joint is specifically designed for core equipment in continuous process industries:
Paper Industry: Dryer cylinders, calender rolls.
Steel & Metal Processing: Cooling rolls in continuous casting, roll neck cooling in rolling mills.
Rubber & Plastics: Internal mixers (Banbury), calenders, mill rolls.
Printing & Textile: Large drying drums, printing cylinders.
General Heavy Machinery: Any rotating equipment requiring high-flow fluid transfer with significant axial load.

Detailed Technical Specifications

For precise engineering evaluation and selection, please refer to the comprehensive specifications below.

Table 1: Core Performance & Physical Data

Parameter	Specification	Remarks
Model	DN250-FF Series	Flange-to-Flange Connection Type
Nominal Diameter (DN)	250 mm	Standard pipe/port size
Connection Type	Flanged (FF)	Bolted flange connection per standard
Max. Working Pressure	1.6 MPa (~232 PSI)
Speed Range	0 – 30 r/min	Recommended for optimal seal life
Temperature Range	-40°C to +120°C
Axial Load Capacity	3,200 kg	Maximum recommended thrust load
Media Compatibility	Water, Lubricating Oil, Hydraulic Oil, Compressed Air, Inert Gases	Specify media for seal recommendation

Table 2: Standard Materials & Media Guide

Component	Standard Material	Notes
Main Body / Housing	High-Strength Carbon Steel or Ductile Iron	Standard finish: anti-rust paint. Stainless steel optional.
Rotating Shaft	Precision Hardened Carbon Steel	Chrome-plated sealing surface available for wear resistance.
Seals	NBR, FKM (Viton), or EPDM	Material selected based on customer’s specific medium and temperature.
Bearings	Heavy-Duty Tapered Roller Bearings	For high radial & axial load capacity.
Gaskets	Rubber-Embedded Metal Gasket	For flange connections.