LN87W series corrugated tube single seat control valve, based on LN87 series control valve single seat pressure balancing structure based on increasing corrugated tube sealing structure, the pressure resistant elastic stainless steel corrugated tube is placed in the support part connected with the valve rod, with the filling composition to double seal, eliminating the media leakage risk. LN87W series corrugated tube single seat control valve, based on LN87 series control valve single seat pressure balancing structure based on increasing corrugated tube sealing structure, the pressure resistant elastic stainless steel corrugated tube is placed in A lëu bï ya tɔ̈ɔ̈u në kä ye kek ya tɔ̈ɔ̈u, kä ye kek ya tɔ̈ɔ̈u, kä ye kek ya tɔ̈ɔ̈u, kä ye kek ya tɔ̈ɔ̈u, kä ye kek ya tɔ̈ɔ̈u,