Check valve is used to prevent back flow of drilling fluid,etc. Use of the check valve can protect pump while it is in idle condition.The check valve utilizes spring pre-load structure.It consist of valve body,valve seat and valve cap etc.The valve is designed and manufactured strictly according to API Spec 6A and the valve has an excellent self-seal effect and seal rubber part has a long service life.
Jining Donghong Machinery Co., Ltd
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API OSHA IADC OPEC RIG ZONE WORLD OIL Drilling Formulas
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