MULTIPLE SPRINGS O-RING/PTFE WEDGE SEAL

Technical features

• Single seal
• Multiple springs
• Bi-directional
• Balanced versions available with suffix -B

Operating limits

• d1 = 14 – 100 mm, 0.500 – 4.000”
• p1 = up to 2.4 MPa (unbalanced) up to 4.0 MPa (balanced)
• t = -35 – 160 °C • vg = up to 25 m/s

Materials

• Rotary faces: carbon graphite, silicon carbide, tungsten carbide • Stationary seats: alumina ceramic, silicon carbide, tungsten carbide • Springs, other matel components: AISI 304, 316, alloys • Secondary seals: CR, EPDM, FPM, FEPM, HNBR, NBR

Stationary seats

• YT858: BSO, BSD (with O-ring), BSP (with O-ring, standard) • YT859/871: BSD (with PTFE ring), BSP (with PTFE ring, standard) • YT874/874B/878/878B: BS1, BS2, OS1 (standard), OS2, OS3 • YT875/875B/879/879B: LS1, LS6 (standard), TS1, TS2, TS3, TS4 • see page 47 for O-ring mounted seat dimensions