Overview

NSEN Flange type Triple offset butterfly valve could provide both bi-directional sealing and uni-directional sealing, it depends on the customer requirements and working condition. But please notice that different type sealing and sealing structure has the different ranges.

• Multi-layer sealing & Metal to metal sealing

• Bi-directional & Uni-directional

• Low opening torque

• Non-rubbing rotation seating

• Torque seated

• Tilted cone sealing face

NSEN strictly follow the free repair, free replacement and free return services within 18 months after the valve is ex-works or 12 months after being installed and used on the pipeline after ex-works (upon which comes first). 

In the case the valve gets failed due to the quality problem during the use in the pipeline within the quality warranty period, NSEN will provide free quality warranty service. The service shall not be ended until the failure is surely made settled and the valve normally workable as well as the client signs the letter of confirmation.

After expiration of the said period, NSEN guarantees to provide the users with on-time quality technical services whenever the product needs to be repaired and maintained.