Long service life and high functional reliability. Two-piece self-aligning gland follower ensures even compression of packing rings. Inconel-reinforced braided packing end rings offer smooth wiping action and prevent extrusion of graphite. Burnished stem and smooth stuffing box surfaces extend the service life of the gland packing. Additional features ensure safe sealing to atmosphere. Additional safety and blow-out protection by standard back seat. Fully confined bonnet gasket with controlled compression ensures leak-proof joint. Welded body/bonnet joint provides added safety at high operating pressures and operating temperatures. – Die-formed endless graphite packing rings reliably seal the stem passage. Reliable, tight shut-off – Hard-faced body seat made of wear-resistant and corrosion-resistant 13 % chrome steel or Stellite. Perfect contact at seat/wedge interface ensures tight shut-off.