DN300 PN25 EPDM Rubber Compensator for Marine Chiller – Custom Square SS316 Flange & Control Rods

SKU: KXT-DN300-EPDM-PN25-SS316

Model TypeKXT-Single Sphere
Size(DN)DN300 (12 inch)
Pressure RatingPN25(25 bar)
Rubber MaterialEPDM Rubber
Flange MaterialStainless Steel 316L
Temperature Range-20°C to +120°C
Working MediumSea Water
Length245mm

Product Description & Specifications

Product Overview

The DN300 PN25 Marine Chiller Rubber Compensator is a high-specification flexible joint specifically custom-engineered for vessel refrigeration and HVAC systems. Featuring a unique non-standard square flange design, it allows for seamless integration into specialized chiller heat exchangers where standard circular flanges fail to fit.
Constructed with high-grade EPDM for thermal stability and premium SS316 stainless steel for ultimate seawater corrosion resistance, this unit is rated for 2.5 MPa (PN25). To ensure operational safety under high-pressure surges, it is equipped with heavy-duty control rods to manage pressure thrust in critical maritime environments.

Key Features

  • Custom Non-Standard Square Flanges: Precision-machined SS316 square flanges tailored to match specific marine chiller and evaporator interfaces.
  • High-Pressure Reliability (PN25): Reinforced bellows construction designed to withstand 25-bar working pressure, ideal for modern high-efficiency cooling circuits.
  • Ultimate Corrosion Resistance: SS316 stainless steel provides superior protection against pitting and crevice corrosion in high-salinity marine atmospheres.
  • Integrated Thrust Restraint: Heavy-duty control rods (tie rods) prevent over-extension and protect fragile chiller nozzles from hydraulic shock.
  • Thermal & Vibration Isolation: High-resilience EPDM effectively dampens compressor vibrations and accommodates thermal expansion in refrigerant loops.

Applications

  • Marine Central Air Conditioning (Chiller) Units: Flexible connection for seawater condensers and evaporators.
  • Vessel Provisions Refrigeration: Vibration isolation for large-scale onboard cold storage systems.
  • Offshore Platform HVAC Systems: Reliable high-pressure joints for salt-spray exposed cooling networks.
  • Industrial Process Cooling: Providing custom flanged solutions for compact heat exchanger modules.

Technical Specifications

Parameter Value
Nomimal DiameterDN300 (12 inch)
Wokring PressurePN25 (2.5MPa)
Test Pressure4MPa
Blast Pressure8MPa
Temperature Range-20°C to +120°C
Axial Extension16mm
Axial Compression25mm
Lateral Defection22mm
Angular Deflection10°
Flange StandardNon-Standard

❓ Frequently Asked Questions (Applications)

Can this KXT DN25 EPDM compensator be used for hot water circulation in HVAC?

Absolutely. EPDM material is specifically designed for hot water, steam, and HVAC systems up to 115°C. The SS304 flange ensures corrosion resistance in humid environments. It’s a perfect fit for pump connectors and chiller installations.

Is it suitable for food-grade or potable water applications?

Yes, EPDM complies with FDA and WRAS standards for potable water. The SS304 flange also resists contamination. For specific food-grade certifications, please contact us for detailed documentation.

What’s the maximum working pressure for DN25 with PN10 rating?

PN10 means the compensator is rated for 10 bar (1.0 MPa) working pressure at ambient temperature. For pressure spikes or pulsating conditions, we recommend staying within 80% of the rating for long service life.

Can it compensate for misalignment during pump installation?

Yes. This rubber compensator allows axial, lateral, and angular movement (axial ±10mm, lateral ±6mm, angular 15°). It effectively absorbs vibration and corrects minor alignment issues between pump and pipeline.