A number of chemical companies in Hebei were awarded creditworthy enterprises

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A few days ago, in the 2010 Hebei Provincial Honesty Enterprise Selection Campaign conducted by the Hebei Provincial Entrepreneurs Association and more than 20 provincial-level units and social organizations, Suizhong Energy Wells Group Fengshan Chemical Branch, Shijiazhuang Bailong Chemical Industry Co., Ltd. , Cangzhou Dahua Co., Ltd., Hebei Jinyuan Chemical Industry Co., Ltd., Longxing Chemical Co., Ltd., and China Petroleum & Chemical Corporation Shijiazhuang Refinery and Chemical Co. Hebei Province will record the information of these enterprises in the credit information basic database of the nationwide networked social credit system for the public to inquire, so that they can obtain more market opportunities.

Pressure seal bonnet is suggested for better closure in high pressure condition, while bolted bonnet is still available for customer's option.  


The pressure seal design incorporates a metal-to-metal seal that becomes tighter as the pressure increases. The initial preload deforms the taper on the soft iron gasket to mate with the taper on the bonnet. The thin knife-edge on the gasket is wedged tightly between the body and the bonnet. The shallow angle insures that the gasket is sealed tightly with only a small upward force on the bonnet. Once the initial seal is created, the body/bonnet joint will remain leak free regardless of thermal or pressure conditions in the valve.After the joint has been assembled, there is no further need to adjust bonnet cap screws.

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