Specification	Description
Product Name	Hydrocone O-Ring (dust/oil sealing ring), equivalent to Part No. 873.0892-00, manufactured by Novincsm (compatible with Delta / Sandvik crushers)
Material & Composition	Nitrile Rubber (NBR, hardness 70–90 Shore A) or Viton (FKM for high-temperature applications); oil-resistant compound with carbon black filler; typical durometer 70–80
Hardness	70–90 Shore A (standard NBR); Viton: 75–85 Shore A for thermal resistance
Operating Temperature	−30 to +120 °C (NBR); up to +200 °C (Viton); continuous operation: −20 to +100 °C
Dimensions	Inner Diameter: 300–500 mm (for 36-inch Hydrocone); Outer Diameter: 320–520 mm; Thickness: 10–20 mm; Cross-section: 5–10 mm
Approx. Weight	0.5–2 kg per ring (size-dependent); NBR density approx. 1.2 g/cm³
Tensile Strength	10–15 MPa (NBR); elongation at break: 300–500%
Compression Set	<25% at 70 °C (22 hours); low permanent deformation for long-term sealing integrity
Color & Finish	Black (standard NBR), smooth surface; optional green (Viton)
Application Method	Press-fit installation into Hydrocone frame; silicone oil lubrication recommended during installation
Surface & Tolerances	Surface roughness: Ra 1.6–3.2 µm; dimensional tolerance: ±0.1 mm (ID/OD); rated pressure: up to 10 bar
Abrasion Resistance	Good (NBR: Taber abrasion loss <150 mg); suitable for dust sealing in mining environments
Thermal Resistance	Excellent up to 120 °C (NBR); optional flame-resistant grade available (UL 94 V-0)
Manufacturing Process	Compression or injection molding; oil-resistant formulation; custom sizes available

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Applications of Hydrocone O-Rings

Primary Function:
Sealing dust and oil in Hydrocone crushers to prevent contamination and leakage; maintaining hydraulic pressure in H4000 / H4800 models.

Industries:

Mining operations in Kenya (granite crushing)
Cement plants (Nairobi / Mombasa)
Construction industry (manufactured sand production)

Types:

Dust Seal: External, made of NBR
Oil Seal: Internal, made of Viton for high-temperature operation

Advantages of Hydrocone O-Rings

Complete sealing performance (zero leakage up to 10 bar), increasing crusher service life by 20–30% through reduced dust ingress
Cost-effective solution (approx. 200,000 IRR compared to OEM parts at 500,000+ IRR)
Compatible with Novincsm / Delta / Sandvik crusher models commonly used in the Kenyan market
Easy installation (press-fit design, replacement in ~10 minutes)
Low compression set, ensuring long-term and stable sealing performance

Disadvantages of Hydrocone O-Rings

NBR temperature limitation up to 120 °C
(For high-temperature mining environments in Kenya, Viton is recommended)
Sensitive to certain chemicals
(avoid aggressive petroleum-based oils)
Custom sizes may require 2–4 weeks lead time for shipment from Iran to Mombasa