Forged Bellow Seal Gate Valve, socket weld ends acc. to ASME B 16.11 (Optional:butt weld end acc. to ASME B 16.25/ screwed end acc. to B 1.20.1), end to end as per manufacturers std. and with ACME stem screw thread and grounded shaft. Multiply bellow with long service life made of stainless steel. Min. life cycle of Bellow tested for 10,000 cycles, metal back seat, safety stuffing box packing made of pure graphite/PTFE.