Check Valve Safety Valve Hydraulic Lock for Crane
Hydraulic lock is a device that uses the principle of hydraulics to achieve locking and releasing functions, and has a wide range of applications in the fields of engineering machinery, aerospace, automotive manufacturing, etc. .
Its working principle is relatively simple, but the role is important. Hydraulic lock is mainly composed of hydraulic cylinders, valves and pipelines. When the hydraulic lock needs to be locked, the valve is closed, the liquid in the hydraulic cylinder is locked in the cylinder, the formation of a certain pressure, this pressure can be transmitted to the locking components through the piston, so that it is fixed in a certain position, to achieve the locking function.
When the hydraulic lock needs to be released, the valve is opened, the liquid in the hydraulic cylinder is released, the pressure disappears, and the locking parts can move freely to achieve the release function
Type |
Max Pressure |
Max Flow |
SO-K8B-1 |
320bar |
40L/min |
SO-K8L-J7 |
320bar |
30L/min |
SO-K6B-3 |
320bar |
10L/min |
SO-K6B-5 |
320bar |
10L/min |

Shandong Yikaide Hydraulic Co., Ltd. is located in Jining, Shandong, which is known as the "hometown of Confucius and Mencius and the land of etiquette". It is a professional technical enterprise that integrates the research and development, manufacturing, sales, and service of hydraulic components.
The company covers an area of approximately 20000 square meters, with a high-tech factory building of 10000 square meters, more than 80 high-precision processing equipment, more than 20 precision testing instruments, and more than 20 product testing and testing equipment. The company has 33 national patents and has been awarded the titles of "National High tech Enterprise", "Provincial Specialized, Refined, and New Enterprise", and "Jining City One Enterprise, One Technology Research and Development Center Enterprise", and has passed the IS09001 quality system certification.
Our main products include rotary joints, multi way valves, balance valves, solenoid valves, manual pumps, synchronous valves, etc. Hydraulic products are widely used in industries such as engineering machinery, mining machinery, special walking machinery, and agricultural and forestry machinery.Our products are selling well in countries such as Russia,Europe, America, Southeast and Asia.

Q1: Are you a trading company or manufacturer?
A: We are a manufacturer with the right to import and export.
Q2: How long is your delivery time?
A: Generally, the delivery time is 5-10 days if the goods are in stock, and 30-40 days if the goods are not in stock.
Q3: Do you provide samples? Is it free or extra?
A: We can provide samples, but they are not free of charge.
Q4: What are your terms of payment?
A: For payments less than 1000 USD, 100% in advance. For payments of more than 1000 USD, 30% T/T in advance, and the balance before shipment.