CDR Mechanical Seal – CENTRIFUGAL THERMOPLASTIC PUMP
CDR CENTRIFUGAL THERMOPLASTIC PUMP (Mechanical Seal)
Plastic and Fluoroplastic Lined Process Horizontal – Single Stage – Process Centrifugal pumps
Lining: PP (Polypropylene), PVDF (Polyvinylidene fluoride), PFA (Perfluoroalkoxy)
Long-coupled and Close-coupled executions
Comply to 2006/42/CE
Design to : EN 22858 / ISO 2858 (ex DIN 24256)
ISO 5199 – UNI 15783
Flanged UNI 1092-2 (ISO 7005-2 ), PN16 RF type B, slotted ANSI 150 RF
Mechanical seal arrangement
The lined shaft seal chamber with its conical design can accommodate the following mechanical seal types :
– CSS-35 Single mechanical seal
– CDC-35 Double cartridge mechanical seal
Single-acting and double-acting me-chanical seals configuration, also on cartridge execution
The ductile cast iron armour protects the fluoroplastic peripheral surfaces of the pump from pipe strain, vibration, external shocks and during the handling; moreover it allows the casing to be Vacuum resistant.
Top centerline discharge for air handling, self-venting.
Draining casing (optional).
The combination of a solid metal core and a Fluopolymers lining (PFA PVDF PP) made by Transfer Moulding assures an excellent mechanical reliability and an optimal chemical resistance.
The problem of reverse rotation during start-up has been eliminated thanks to the key driven system.
Standard back vanes reduce axial thrust and seal chamber pressures to guarantee and extraordinary bearing and seal life.
LINED SEAL CHAMBER
Wide conical design equipped with breaking ribs.
Available in PFA, PVDF or PP lined execution and in a conical shape.
The conical seal chamber is designed to push away from the seal solids and slurry, back into the flow path of the process liquid.
Self-venting, Self-flushing, Self-draining.
The special design of the shaft guarantees no weak point that could cause leakage; the impeller is fixed on the shaft with a long screw that pass through the shaft.
Rigid shaft designed for less than 0.05 mm shaft deflection increases the seal life.
Standard 400 series stainless steel shaft (1.4057) provides reliable power transmission and corrosion resistance at both the pump and coupling ends.
LINED SHAFT SLEEVE
– Impeller and shaft sleeve will be 2 separate pieces : thanks to this design, in case of failure the shaft sleeve design will protect from damage the impeller
– The seal, between the shaft sleeve and the impeller, is guaranteed by the push-in-position design.
– All the parts in contact with the medium are made by PFA Lined and SiC
– The shaft sleeve is synchronized to the shaft and the impeller, securing against loosening if the pump is started up in the wrong direction of rotation
– The shaft sleeve is available made by PFA lined, however its design allows to use other materials (i.e. Hastelloy C)
– The inner metallic core of the shaft sleeve, pushes the O-ring against the impeller, granting a secured seal, even in case of failure
The closed impeller design, made around a sturdy metallic core surrounded by a minimum 4mm of fluoroplastic material, provides maximum efficiency and reliability
BEARING BRACKET FOR LOMG COUPLED EXECUTION
Extra-Large Oil Sump design allows to get a large oil capacity.
Breather / filling plug on top .
Oil sight glass grants a proper oil level.
Large drain plug.
The bearing frame can be equipped with 3 different type of protections :
• Standard oil seal
• Labyrinth seal
• Non-contacting labyrinth seal
Constant level oiler (as an option).
Conditions monitoring (as an option).
Heavy duty ball bearings configuration to provide L10 bearing life in excess of 17,500 hours (up to 1.25 QBEP).
Frontal (impeller side) : one row roller bearings type with high radial load rating.
Rear (motor side) : pair of angular contact ball bearings with high axial load rating.
Closed impellers are indicated to be used with clean liquid. They have a good hydraulic efficiency and there’s no recirculation between the blade’s plane.
SEMI OPEN RADIAL IMPELLER
Semi – open Radial impellers are indicated to be used with high solids concentration liquids. They have a low hydraulic efficiency and there’s recirculation between the blade’s plane.
Performances 2900 rpm : Q max = 110 m3/h -> H max = 65 mcl
Electric Motors UCL : 1,1 kW (size 80) -> 25 kW (size 200), UCL-B : 1,1 kW (size 90) -> 18.5 kW (size 160)
Temperature range : PP : – 10 °C -> +70 °C, PVDF : – 30 °C -> +100 °C, PFA : – 50 °C -> +140 °C
Allowable Pressure Range : PN16 (20 °C)
Flange Connections : UNI 1092-2 / ISO 7005-2 PN 16, type B, slotted ANSI 150
Viscosity : min : 1cSt – max : 200 cSt