Project Description

NUY DUAL SEALS

  • NUY DUAL SEALS
  • NUY DUAL SEALS
  • NUY DUAL SEALS
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Item No. Description
1 Bellows unit
2, 5, 7,10, 13, 15 O-Ring
3, 16 Set screw
4 Seat
6 Shaft sleeve
8 Cover
9 Seal face
11 Spring
12 Seat
14 Drive collar
17 Retaining ring
18 Assembly fixture
19 Hex socket head screw
20 Gasket
21 Screw Plug
22 Gasket
  • Ideal for use in process pump
    standardization
  • O-ring is dynamically loaded to prevent
    shaft damage.
  • Dimensional modification of the stuffing
    box chamber is not required due to
    short radial installation height
  • Ideal to convert and retrofit pumps with
    packings and large volume OEM
    production
  • Cartridge unit factory assembled for
    easy installation, which reduces downtime
  • Rugged design for long operating life
  • Bellows design efficiently ensure selfcleaning
  • Suitable for high temperature
    applications
  • Refining technology
  • Petrochemical industry
  • Hot media
  • Cold media
  • Highly viscous media
  • Pumps
  • Special rotating equipment
  • Dimensions, items and descriptions as for NUY-DN, but with optimized seal face geometry
    for pressurized operation according to API Plan 53/54. A barrier fluid system (e.g.
    Sealmatic BFS2000) is necessary
  • Pressure: p1 = 10 bar (145 PSI)
  • Speed = 20 m/s (66 ft/s)
  • Barrier fluid circulation system:
    p3max = 16 bar (232 PSI)
    Δp (p3 – p1) ideal = 2 … 3 bar (29 … 44 PSI)
    Δp (p3 – p1) max = 16 bar (232 PSI) API Plan 53/54
  • Pump startup:
    Δp (p3 – p1) max = 16 bar (232 PSI) allowed
  • Seal face: Carbon graphite (A),
    Silicon carbide (Q1)
  • Seat: Silicon carbide (Q1),
    Tungsten carbide (U2)
  • Secondary seals: FPM (V), EPDM (E), FFKM (K)
  • Bellows: Inconel® 718 (M6)
  • Springs: Hastelloy® C-4 (M)
  • Metal parts: CrNiMo steel (G), Duplex (G1)
  • Shaft diameter: d1 = 25 … 80 mm (1″ … 3.15″)
  • Temperature : t* = –40 °C … +220 °C
    (– 40 °F … + 428 °F)
  • Pressure: p 1 = 25 bar (232 PSI)
  • Speed = 20 m/s (66 ft/s)
  • Barrier fluid circulation system:
    p3max = 16 bar (232 PSI)
    Δp (p3 – p1 ) ideal = 2 … 3 bar (29 … 44 PSI)
    Δp (p3 – p1 ) max.
    = 10 bar (145 PSI) at <120 °C (<248 °F)
    = 5 bar (73 PSI) at ≤ 220 °C (≤ 232 °F)
  • API Plan 52 (53/54)
    Pump startup:
    Δp (p3 – p1 ) max.16 bar (232 PSI) allowed
    * Operating limits of O-rings to be observed
  • Dual seal configuration
  • Balanced design
  • Independent of direction of rotation
  • Cartridge construction
  • Metal bellows design
  • Designed with integrated pumping
    device for increased efficiency in
    circulation
  • Stationary O-ring design
  • Seals with API Plan 52 and API Plan
    53/54