Class 150LB American standard flange gate valve rising stem OS&Y

What is Z41W-150LB-P Class150 gate valve?

Z41W-150LB-P is a flange rising stem gate valve with pressure rating of Class150. It adopts the rising stem structure of OS&Y, and completes pipeline opening and cutting through gate lifting.

Current product parameters

The pressure class is ANSI Class150, and the material options include such as WCB, 304, 316L, CF8, and CF8M. The specific valve body castings and valve internals materials should be confirmed according to the actual BOM, medium conditions, and project material specifications.

Is Class150 150psi?

No. Class150 is a pressure rating name, and the actual allowable pressure of the valve may vary with the material and operating temperature. It should be confirmed according to the pressure temperature rating in the corresponding standards.

What are the characteristics of OS&Y rising stems?

The open stem structure facilitates observation of the valve's opening and closing status from the valve stem position, while also requiring reserved space for lifting the stem above the valve. The actual packing, valve stem, and gate design shall be based on the product drawings.

How to choose sealing surfaces for RF and RTJ?

The form of the flange sealing surface needs to match the pipeline flange, pressure rating, and project specifications. It cannot be assumed that all Class150 specifications provide the same sealing surface by default, and should be confirmed according to specific orders.

Is gate valve suitable for continuous adjustment?

This type of gate valve is mainly used for fully open or fully closed isolation. Long term semi opening may cause the gate and valve seat to be eroded by high-speed media, so ordinary OS&Y gate valves should not be used as fine process control valves.

What parameters are required for selection?

Media, temperature, working and design pressure should be provided NPS/DN、 Flange standards and sealing surfaces, valve body and trim materials, sealing requirements, opening and closing frequencies, and project applicable standards.

Z41W-150LB-P American standard gate valve common problems

Does Class150 mean that the maximum working pressure is 150psi?

No. The actual pressure rating is related to the valve material and operating temperature, and should be confirmed according to the corresponding standards and product data.

Is it necessary to use RF flange for Class150 gate valve?

not always. The flange sealing surface needs to be confirmed based on the actual pipeline and product configuration.

Can the Minggan OS&Y gate valves be used for long-term flow regulation?

Usually, full open and full close isolation are the main methods, and long-term small opening throttling may cause scouring of the gate and valve seat.