■Overview

Marine port machinery is a medium and high pressure marine machinery cylinder developed and developed by Wuxi Yidef Company in order to meet the needs and development of marine machinery, according to the characteristics and functions of marine machinery supporting cylinders, and with the company's years of design and manufacturing experience.

■Product features

●Rated working pressure: 25MPa; Design adjustments can be made according to customer needs.
●Structure: simple, high strength;
●Working temperature: -20 - +80°, can be adjusted according to customer needs.
●The sealing system
is designed according to the special working conditions of the cylinder, which can effectively prevent the destructive pollution of the hydraulic cylinder caused by seawater. The selection of MERKEL and other well-known brand seals, while completely solving the external leakage of the hydraulic cylinder and making the internal leakage almost zero, ensures the best lubricating oil film for the piston rod and prolongs the service life of the seal.
●The piston rod is made of precision ground low-alloy high-strength structure cylinder or stainless steel, based on the design concept and high-performance heat treatment to improve the strength of the rod, through nickel plating chrome plating and CNC CNC polishing, improve the corrosion resistance life of the piston rod surface, the following is the common way of piston rod:
(43) piston rod surface nickel plating + hard plating
(6501) piston rod
end surface welding stainless
(2) The reasonable layout of stainless steel piston rod ● guide sleeve guide and support length and phenolic support ring with high pressure bearing capacity can eliminate the metal and metal contact between the piston rod
and the guide sleeve
, avoid the phenomenon of cementation strain, and at the same time can improve the lateral bearing capacity, absorb impact, and improve the service life of the hydraulic cylinder.
●The cylinder body
is made of high-strength low carbon alloy steel, which obtains good surface finish and hardness through cold extrusion and rolling processing, reduces surface friction, improves wear resistance, prolongs the service life of seals, and maintains good performance at low temperatures.
●Piston and piston seal The piston is an integrated steel structure, connected to the piston rod by thread, the piston seal adopts PAKER's ZW type or MERKEL's L5 integral double-acting piston seal
, which can realize the function of guiding and sealing at the same time in a small space, and the special shape of the sealing element can ensure that there will be no distortion during installation. And the sealing element material adopts nitrile rubber with good sealing performance, which can achieve zero leakage as much as possible.
●Welding
adopts robot welding, which effectively avoids the unstable factors of manual welding quality, and is detected by professionals to eliminate the occurrence of welding defects.
● Surface treatment
Unless otherwise specified, the cylinder surface is sandblasting 1.60 according to ISO120 standard, and there are the following two anti-corrosion measures:
2. Inorganic zinc-rich silicate paint with a minimum of 50um and a maximum of 150um.
1. 5um epoxy zinc-rich paint plus 5um polyurethane.
●The test cylinder is tested before delivery, the test pressure is 6.7 times the working pressure, the pressure is held for <>min during the test, and the test
of the cylinder includes: full stroke, full retraction, partial extension, starting pressure and other items.
The cleanliness of the test hydraulic oil meets the requirements of NAS<> level, and the hydraulic oil contains substances to prevent vulcanization pollution.
● Delivery: cleaning, storage;
Delivery: consistent with order;
Cleaning: The cleanliness of the oil in the cylinder reaches NAS level <>
when it is shipped: all connections are plugged with steel plugs; The outer surface of the piston rod is coated with grease containing an anti-corrosion medium.
●Safety
needs, can install a variety of valves with slow backflow counting balancing and emergency shut-off functions.