The PH 277 – 4SP hydraulic hose is designed according to EN 856 / ISO 3862 standards and is built for medium to high-pressure hydraulic applications. It features a synthetic rubber inner core that resists oil and water, reinforced with four high-tensile steel wire spirals for strength and durability. The outer cover is made of abrasion-, weather-, oil-, and ozone-resistant synthetic rubber, making it suitable for harsh working environments. This hose operates within a pressure range of 165 to 450 bar and is commonly used in hydrostatic transmission systems, earthmoving equipment, and material handling machinery. It supports petroleum-based, synthetic, and water-based hydraulic fluids, with a temperature range from -40°C to +100°C (up to +120°C intermittently) and a long service life of up to 400, 000 impulse cycles. PH 277 4SP EN 856 / ISO 3862 Hydraulic hose High-pressure hose Steel wire spiral Synthetic rubber Oil resistant Abrasion resistant Hydraulic systems Earthmoving equipment Material handling Hydrostatic transmission Working pressure (165–450 bar) Temperature range (-40°C to +120°C) 400, 000 impulse cycles Industrial hose Heavy-duty applications