Filter press high-pressure oil supply systems demand extreme performance from hydraulic hoses: sustained hold pressure, frequent pulse cycles, line-on-frame abrasion, and chemical slurry exposure. This SAE J517 2SN 1" hydraulic hose fully complies with EN 853 standards, rated at 300 bar working pressure, purpose-built for filter press high-pressure supply. The EN853 2SN hydraulic hose features two layers of high-tensile steel wire braid reinforcement with a 4:1 safety factor (burst pressure ≥1200 bar) and a high-wear outer cover engineered to withstand repeated friction and particle abrasion. Filter press hold pressure typically ranges from 250–280 bar with spikes reaching 300 bar, which mandates a 300 bar rated EN853 2SN hydraulic hose — never substitute with a lower-rated 210 bar or 250 bar hose.
| Parameter | 2SN 1" (This Product) | 1SN 1" | 4SP 1" | R12/R13 1" |
|---|---|---|---|---|
| Standard | EN 853 2SN / SAE 100R2AT | EN 853 1SN / SAE 100R1AT | EN 853 4SP / SAE 100R12 | EN 853 R12 / R13 |
| ID | 25.4 mm | 25.4 mm | 25.4 mm | 25.4 mm |
| OD | ≈ 41.3 mm | ≈ 38.1 mm | ≈ 44.5 mm | ≈ 47.6 mm |
| Working Pressure | 300 bar | 210 bar | 350 bar | 250 bar |
| Burst Pressure | ≥ 1200 bar | ≥ 840 bar | ≥ 1400 bar | ≥ 1000 bar |
| Safety Factor | 4:1 | 4:1 | 4:1 | 4:1 |
| Reinforcement | Two-wire braid | Single-wire braid | Four-wire spiral | Multi-wire spiral |
| Min. Bend Radius | ≈ 250 mm | ≈ 200 mm | ≈ 300 mm | ≈ 350 mm |
| Pulse Life | ≥ 1,000,000 cycles | ≈ 400,000 cycles | ≥ 1,000,000 cycles | ≥ 500,000 cycles |
| Wear Rating | High (thick cover) | Medium (thin cover) | Very High (extra thick) | Medium |
| Weight (kg/m) | ≈ 1.45 | ≈ 1.10 | ≈ 2.10 | ≈ 1.80 |
| Best For | Filter press supply / excavator main circuits | Low-pressure return / drain | Ultra-high-pressure static lines | Ultra-high-pressure dynamic lines |
| Price (USD/m equiv.) | 15~150 CNY | 8~30 CNY | 40~200 CNY | 30~120 CNY |
The comparison table above makes the core difference clear: EN853 2SN hydraulic hose uses a two-wire braid construction that delivers the best all-round balance for filter press applications. The filter press cycle — feed, hold-pressure, discharge — generates thousands of pressure pulse cycles per day. The two-wire braid of the EN853 2SN hydraulic hose delivers roughly 2.5× the pulse fatigue life of 1SN (400K vs 1M cycles) while maintaining a smaller bend radius (250 mm) than 4SP (300 mm) or R12 (350 mm), making it far easier to route in the tight spaces of a filter press frame.
Versus 4SP: 4SP offers higher pressure (350 bar) but its four-spiral construction means larger OD, heavier weight, larger bend radius, and 2–3× the cost — over-engineered for a 300 bar system. Versus R12/R13: R12/R13 are multi-spiral hoses with lower pulse life and poorer flexibility than 2SN, better suited to static ultra-high-pressure lines, not the dynamic pulse environment of a filter press. Versus 1SN: 1SN is rated at only 210 bar — it cannot handle the 300 bar spikes in a filter press, and its pulse life is only 1/3 of 2SN. Using 1SN on a hold-pressure line is a serious safety risk.
Bottom line: EN853 2SN hydraulic hose is the optimal choice for filter press 300 bar high-pressure oil supply — right pressure, superior pulse resistance, excellent wear performance, tight bend radius, and best value.
Filter press oil lines run along the frame with complex routing and multiple bend points. Never bend below 250 mm radius (better than 4SP's 300 mm and R12's 350 mm); start bending at least 2× the tube diameter from the fitting. Hoses move repeatedly as filter plates open and close; under pressure the EN853 2SN hydraulic hose shortens by 3–4%, so always leave slack during installation — never pull taut. If printed markings on the hose body appear twisted, internal stress concentration is already accelerating wire braid fatigue and the routing must be corrected immediately. Use crimp-type fittings only — never nut-type connections, as reciprocating vibration will loosen them within hours. The filter press environment is wet with chemical slurry splash; although the outer cover is wear- and oil-resistant, regular inspection for cracking, bulging, and abrasion is essential. Any exposed wire braid or fitting leak requires immediate shutdown and replacement — a burst high-pressure oil line causes hold-pressure failure, leading to wet filter cakes and serious production loss.
