lever locking arrangement for isolating cock of brake valve of vesda s ystem as per rcf drg no mi008044 warranty period 30 months after the date of delivery lever locking arrangement for isolating cock of brake valve of vesda s ystem as per rcf drg no mi008044 warranty period 30 months after the date of delivery lever locking arrangement for isolating cock of brake valve of vesda system as per rcf drg mi008044 warranty period 30 months after the date of delivery