ESP series valves are newly designed bye E.MC pneumatics & hydraulics for one year, but immediately get very good feedback from the market. With plastic body, higher pressure 1.3MPa,from 3/8" to 1-1/2",pilot acting with all same parameters as SLP. ESP valve has much lower weight and cost, and hence the valve becomes a good replacement for many brass valves and stainless steel valves which cost much higher.