1. Product: if there is a specified model standard, please call the sales hotline to inquire about the price and learn more! 2. Technical support: if the product model and specification are not specified, please send the working condition requirements, design drawings and technical specifications to the company by fax or e-mail. 3. Parameters required for product ordering: diameter (DN), nominal pressure (MPA), temperature (℃), connection mode (thread, flange, clamp, etc.). 4. Product driving mode: manual, worm gear, pneumatic, electric, etc. 5. Product standards: national standard GB, Japanese Standard JIS, American Standard ANSI, German standard DIN, etc. 6. Quotation confirmation: the company will provide the quotation list and technical standard description to the customer for confirmation, and draw up the contract after the technical confirmation of both parties. 7. Quality requirements, quality standards and conditions for the supplier to be responsible for quality: according to relevant national quality standards.