In order to ensure your requirement for usage,pless explain in detail in your order:Type,specification,material,nomial pressure,working pressure and temperature used,maximum flow rate,pressure difference,medium composition of valve,driving type of valve and standard for connection of valve with pipes etc. For the convenience usage of consumers ,our company can provide flange and bolts completed with valve,and will provide wearing parts according to the requirement of consumers .In selection of product types,consumer can present his requirement for product material,connection standard and technical data and give clear declaration in your contract. Our company also can carry out study and development on new product according to requirement of consumer.