Sentry System for Varnish Removal product photo Primary L

Sentry System for Varnish Removal

Varnish Removal

Varnish is the thin, insoluble film deposit that forms on oil-wetted surfaces inside a turbine lube system, including bearings and servo valves. It's formation is often attributed to higher operating temperatures, smaller fluid reservoirs, high cyclic service, and fluid base stocks that have lower solvency for varnish precursors.

You can't see it, but you know it's there taking your hydraulics system down one component at a time.

When varnish forms in turbine oils, the effects can be devastating to the operation and availability of the equipment, and may include:
  • Sluggish controls and servo valves stiction, which can lead to expensive repairs or replacement
  • Costly downtime from unscheduled outages
  • Start-up delays from unresponsive control systems
The demand for reliability, availability, and seamless operation of today's power turbines requires an efficient, easy, and reliable method for removing varnish not only from the oil, but also from the wetted metal surfaces inside the machine.

Pall Sentry™ Varnish Removal System

The Pall Sentry™ resin-based system is designed to efficiently remove varnish precursors from the oil. Doing this forces varnish deposits on metal surfaces back into the solution for further removal by the Sentry treatment skid. Treatment continues while the turbine operates, until the entire oil system is free of varnish, as shown by consistently low MPC value in the oil.

Efficiency and Ease-of-Use

Other filtration/adsorption or electrostatic removal methods are very dependent on operating conditions such as operating temperature, cycling rates, and the chemical make-up of the oil.

The Pall Sentry resin-based varnish removal skid can remove varnish precursors with greater reliability and efficiency because it is largely temperature independent and does not rely on mechanical interception of the varnish precursors.

The stand-alone system uses a specially formulated resin in a semi-dry package. The skid uses three resin bags stacked in the vessel, which can easily be changed and disposed of as varnish is removed.

Operation

The Pall Sentry fluid treatment system is connected to the main lube or control oil reservoir and circulates the fluid at a rate of 3 gpm (11.35 l /m) through the resin and a high-efficiency Pall Ultipleat® SRT particulate removal filter, the latest generation in machine lube protection. With each pass through the system, varnish precursors are removed and the fluid is returned to the reservoir. Once used, the resin bags can be easily replaced and disposed of.


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Description

Varnish Removal

Varnish is the thin, insoluble film deposit that forms on oil-wetted surfaces inside a turbine lube system, including bearings and servo valves. It's formation is often attributed to higher operating temperatures, smaller fluid reservoirs, high cyclic service, and fluid base stocks that have lower solvency for varnish precursors.

You can't see it, but you know it's there taking your hydraulics system down one component at a time.

When varnish forms in turbine oils, the effects can be devastating to the operation and availability of the equipment, and may include:
  • Sluggish controls and servo valves stiction, which can lead to expensive repairs or replacement
  • Costly downtime from unscheduled outages
  • Start-up delays from unresponsive control systems
The demand for reliability, availability, and seamless operation of today's power turbines requires an efficient, easy, and reliable method for removing varnish not only from the oil, but also from the wetted metal surfaces inside the machine.

Pall Sentry™ Varnish Removal System

The Pall Sentry™ resin-based system is designed to efficiently remove varnish precursors from the oil. Doing this forces varnish deposits on metal surfaces back into the solution for further removal by the Sentry treatment skid. Treatment continues while the turbine operates, until the entire oil system is free of varnish, as shown by consistently low MPC value in the oil.

Efficiency and Ease-of-Use

Other filtration/adsorption or electrostatic removal methods are very dependent on operating conditions such as operating temperature, cycling rates, and the chemical make-up of the oil.

The Pall Sentry resin-based varnish removal skid can remove varnish precursors with greater reliability and efficiency because it is largely temperature independent and does not rely on mechanical interception of the varnish precursors.

The stand-alone system uses a specially formulated resin in a semi-dry package. The skid uses three resin bags stacked in the vessel, which can easily be changed and disposed of as varnish is removed.

Operation

The Pall Sentry fluid treatment system is connected to the main lube or control oil reservoir and circulates the fluid at a rate of 3 gpm (11.35 l /m) through the resin and a high-efficiency Pall Ultipleat® SRT particulate removal filter, the latest generation in machine lube protection. With each pass through the system, varnish precursors are removed and the fluid is returned to the reservoir. Once used, the resin bags can be easily replaced and disposed of.
Specifications
 
 
Flow Rate: 3.0 GPM (0 -11.36 LPM)
Inlet Pressure Range: -14 in Hg to 10 psig (-0.47 bar to 0.69 bar)
Maximum Inlet Viscosity: 500 cSt
Maximum System Pressure: 80 psi (5.4 bar)
Maximum Fluid Temperature at Inlet: 140 °F (59.4 °C)
Inlet Pump Pressure Relief Setting: 80 psi (5.5 bar)
Outlet Pump Pressure Relief Setting: 80 psi (5.5 bar)
Ambient Temperature Range: 60 °F to 140 °F (16.6 °C to 59.4 °C)
Filter Change-out (both the bags & particulate): 30 psid (1.8 bar) DP
 

Dimensions1

 
Height: 72 in. (1829 mm)
Width: 29 in. (737 mm)
Length: 41 in. (1041 mm)
Dry Weight: 660 lbs (297 kg)
 
1 All dimensions are nominal.

Materials of Construction

 
Item Description
Vessel Material Carbon steel
Vessel Surface Finish Powder coated exterior, color Pall blue. Paint is compatible with phosphate esters.
System Seals Fluoroelastomer or equivalent resistance to phosphate ester hydraulic fluid – i.e. Viton.
Electrical Refer to the skid wiring diagram for power requirements. All electrical components within the system are rated NEMA 4. Wiring methods meet the requirements of NFPA 70.
Inlet/Outlet Connection Sizes 1 ⁄2"
 
Type
Purifiers
Use
Purification
Ordering Information
Filter Housing Assembly Part Number : XFP [1] [2] [3] [4] [5] [6] [7] [8]
(Resin Bag Kit must be purchased separately.)

Replacement Element Part Number : UE219AS08Z

Table 1:

 
Code Electrical Options
G 6 115 VAC 60 Hz 1P
M 5 220 VAC 50 Hz 1P
W 4 480 VAC 60 Hz 3P
14 575 VAC 60 Hz 3P
T 3 415 VAC 50 Hz 3P
R 3 380 VAC 50 Hz 3P
 

Table 2:

 
Code Filter Grade Options
AS 12 microns
 
ß12(c) ≥1000 based on ISO 16889
Other filter ratings available on request

Table 3:

 
Code Seal Options
Z Fluorocarbon
 

Table 4:

 
Code Mounting Options
C Caster
N Floor mount
 

Table 5:

 
Code Connection Options
P BSP
T NPT
 

Table 6:

 
Code Manufacturing Region
W Americas
A Asia
E EMEA
 

Table 7:

 
Code Language
EN English
ES Spanish
FR French
PR Portuguese
 

Table 8: Fluid Used

 
Code Fluid Used
X1 Synthetic fluid
X2 Mineral oil
 


 
Replacement
Resin Bag
Part No.
Resin Bag Kit (complete set of three) XBG-PGGKIT
Resin Bag (individual) XBG-PGG
 
Application
Turbine Lubrication, Turbine Lube & Hydraulics, Turbine Lubrication, Turbine Lubrication
Segment
Combined Cycle Plants
Gas Turbines
Nuclear Plants
Steam Plants