I-NSEN yasungulwa ngo-1983, igxile emkhakheni wama-valve e-butterfly angavamile. Ngemva kweminyaka eminingi yokuhlola nokusebenza, uchungechunge lwemikhiqizo ekhona ngezansi selwakhiwe:

• Ivalvu yebhabhathane eliyi-eccentric kathathu
• I-valve yebhabhathane esebenza kahle kakhulu
• Ivalvu yevemvane yensimbi kuya kwensimbi
• -196℃ ivalvu yebhabhathane eliyi-cryogenic
• I-valve yebhabhathane yokuvikela umlilo esezingeni eliphezulu
• I-valve yebhabhathane elithambile
• I-valve yebhabhathane engamelana namanzi olwandle

Emkhakheni wobungcweti, gxila kuma-valve e-butterfly. I-NSEN nayo ithuthukisa njalo iziqu zayo futhi ifakazela amandla ayo.

• Isitifiketi Sesistimu

I-CE (i-PED)

I-ISO 9001

I-ISO 14001

I-ISO 45001

• Isitifiketi Sokuvikela Umlilo

I-API 607

• Isitifiketi Sokukhishwa Okuphansi Komoya

I-API 641

I-ISO 15848-1

I-TA-LUFT

• Isitifiketi saseRussia

I-TR CU 010 / 032

• Isitifiketi sokuhlolwa kwe-TPI

Umbiko Wokuhlolwa Kwevalvu Yezimvemvane Eziyi-Cryogenic -196

Umbiko Wokuhlola we-Neutral Salt Spray (NSS)

Umbiko Wokuhlola Wokugqwala Okuphakathi Kwezinhlayiya (IGC)