Non standard valve is a kind of valve without clear performance standards. Its performance parameters and dimensions are specially customized according to the process requirements. It can be designed and changed freely without affecting the performance and safety. However, the machining process still follows the relevant provisions of the national standard.

The design of non-standard valves should consider the rationality and feasibility from the whole. In addition to relying on traditional theories, the design also needs more innovative research and development. Therefore, generally, there are elites in the industry to complete similar work, and the engineers will hand over the drawings after the design is completed.

The types of non-standard valves are divided into sewage valve series (penstock gate and flap valve) and metallurgical valve series (ventilation butterfly valve, slide gate valve, goggle valve, ash discharging valve, etc.)

1. Sewage valve series

2. Metallurgical valve series