千斤顶的选择：
一、 力的选择
工作时需要多大吨位的千斤顶，SY千斤顶在考虑了填充密封圈的阻抗损失和千斤顶与活塞之间的支承阻抗损失后，其力为额定值的94%~95%。当千斤顶需严格且连续运行时，推荐选用的千斤顶吨位要比负载高，通常按照70%~80%计算。
二、 行程的选择
若安装空间允许，请选择行程比实际所需长的千斤顶，以提高系统的可扩展能力。
三、 类型的选择
千斤顶基本分为两类：单作用千斤顶（弹簧复位或负载复位）和双作用千斤顶CLS和CLL型单作用千斤顶没有弹簧装置，只能通过载荷或者重力收缩，需要千斤顶做什么工作？是拉、顶还是两者都需要。（在液压作用下，单作用只能顶升，双作用即可顶升也可回拉）。
四、 数量的选择
是否需要多个千斤顶同步操作？
五、 安装和运行时的警告及注意事项
确保载荷是作用在千斤顶中心且其方向沿着千斤顶方向。
所允许的偏心载荷必须是在千斤顶技术要求的2.5%之内。
通过把法兰安装在颈部螺纹上，来安装千斤顶。
清除系统中的空气。
禁止千斤顶在载荷下时脱开油泵接口。
避免千斤顶活塞过度伸展。
当任何漏油的征兆出现时，立即检查。
保持液压系统清洁。
请远离热、火、雨、海水、潮湿等等。
按时维护检查千斤顶。
活塞螺丝与基部附件必须完全地联络在活塞端部。
请使用标准的千斤顶工作用油。
装有管接头的千斤顶不能作快速压力释放应用和冲击压力形成应用。当拉力端管路接头
完全堵塞时，禁止运行双作用千斤顶。确保管接头完全紧固。如果装有自封型管接头的千斤顶突然停止运行，则最大的可能就是由于管接头的松动导致了油流的堵塞。
六、 非标准千斤顶与特殊千斤顶
可根据您的要求制造非标准或者5000KN（500TONS以上的千斤顶）
1、 需出多大吨位力。
2、 所需行程和收缩后高度，两者可同时考虑。
3、 是否所有活塞、颈部或者基部螺纹均需要。
4、 所要求的使用平率和条件。
5、 所有其他的信息均可获得。
Selection of cylinder
1、 Force selection
Considering the impedance loss of the seal ring and the supporting impedance loss of the cylinder with the piston, the force of SY the cylinder is 94%~95% of the set force. When the cylinder needs to work strictly and continuously, it is recommended to choose a cylinder whose tonnage is higher than the load itself usually calculated by 70%~80% of the cylinder.
2、 Stroke selection
If the space permitted, please choose a cylinder whose stroke is longer than the practical need to add the system expandable capacity.
3、 Type selection
There are basically two types of cylinder: single-acting cylinder (spring or load returning) and double-acting cylinder. CLS-series and CLL-series single-acting cylinder have no set of spring and can only be retuned by load or gravity. What do you need cylinder? To pull or lift or both? (Under the hydraulic reaction, single-acting one can just lift, but doule-acting one can both lift and pull).
4、 Quantity selection
Whether you need several cylinders to work synchronously?
5、 Warning when install and operate
Make sure that the load is located in the centre of the cylinder and the load direction is in accordance with the cylinder.
The allowable eccentric loads must be within 2.5% of the technical requirements of cylinders,
By fitting the flange on the neck threads to install the cylinder
Eliminate the air in the system.
It is forbidden to remove the hydraulic pump connection when the cylinder is under load.
To avoid the cylinder piston over extended
When there is some omen of oil leaking, please check it immediately.
Keep the hydraulic system clean.
Please keep away from heat, fire, rain, seawater, and moisture and so forth.
Please maintain and inspect the cylinder on time.
The piston screw and base accessories must be connected to the piston end completely.
Please use standard cylinder oil.
Cylinder fitted with hose quick coupler can’t be used for applications of releasing pressure urgently and forming shock pressure. When the quick coupler in the pulling end is blocked completely, it is forbidden to operating double-acting cylinder. Make sure the quick coupler is firmly tightened If the cylinder fitted with self-confined quick coupler stops working suddenly, the most possible case is that the fluid flow is blocked due to the loosening of the quick coupler.
6、Nonstandard cylinder and special cylinders
We can customize nonstandard cylinders or ones over 5000KN (500Tons) on your requirements.
- How much a tonnage force is needed?
- You should consider both the stroke and the height after retraction.
- Whether all the threads are needed on the piston, neck or base or not?
- The required frequency and conditions of use.
- Any information available.
