This is a Bellows Kit for Elastomer Viton Sealed Bonnets (not metal sealed bonnets) for 1.5 inch to 3 inch HVA Gate Valves. Contains Bellows, O-Rings and Retaining Rings. For installation and maintenance instructions see .pdf below and start on page 14.

This Kit Fits the Following HVA Elastomer Viton Sealed Bonnet Gate Valves
PART NUMBERS:
HVA KF40 Gate Valve PN: 11110-0153 / Ideal Vacuum PN: P104205
HVA KF50 Gate Valve PN: 11110-0203 / Ideal Vacuum PN: P104240
HVA ISO63 Gate Valve PN: 11110-0253 / Ideal Vacuum PN: P104203