This combination of disc springs and dual valve seal rings protects against expansion and contraction due to heating and cooling. This ensures dependable operation, even after years of service.
盘簧与两个密封环的组合，可防止因加热或冷却产生的膨胀和收缩，由此确保阀门即使使用多年后仍运行可靠。
Same function as DPP-250: frequency control, adjustable stroke, touch heating, positive forming, capsule orientating, image and character register, air cushion heating-seal and chequered plates.
产品介绍：功能与250型类同：变频调速、行程可调、接触加热、正压成形、胶囊调头、图文对版、气垫热封、上下网纹。
When Pipes, valves and water seal equipments is freezing, only hot water or steam heating can be use to thaw, and open fire is prohibited.
管道、阀门和水封装置冻结时，只能用热水或蒸汽加热解冻，严禁使用明火烘烤。
On the base of developing road crack-seal machine with a company, the author study heating system of road crack-seal machine.
本文基于某型号的道路灌缝机的研发，对道路灌缝机加热系统的传热进行了研究。
TOP BEST-661 has high surface adhesion force on vacuum bag and a variety of tools. In the curing cycle it has excellent seal, and very easy to remove from the cold or heating surface after the curing.
TOPBEST- 661密封胶带对各种真空袋及复合工具都有较高的粘着力，在树脂固化周期内具有优异的密封性，固化后非常容易从冷或暖的工具表面去除干净。
TOP BEST-661 has high surface adhesion force on vacuum bag and a variety of tools. In the curing cycle it has excellent seal, and very easy to remove from the cold or heating surface after the curing.
TOPBEST- 661密封胶带对各种真空袋及复合工具都有较高的粘着力，在树脂固化周期内具有优异的密封性，固化后非常容易从冷或暖的工具表面去除干净。
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