SPX TG H15-50, Instruction Manual, Page: 68 / 110

68 A.0500.351 – IM-TGH/07.02 EN (10/2015)
For version Item Nos.
For TG H pump size
2-32/3-32 6-40 15-50/23-65 58-80 86-100 185-125 360-150
GS, GG, GD 9010 1 x x x x x x x
GS
9020 2
Adjusting distance Y in mm
– 1 1 1 1 1 1
9030 2 – M6x10 M6x16 M8x20 M8x20 M8x25 M10x30
GD
9040 1
Adjusting distance Y in mm
0.6 8.9 11.9 10.3 10.8 10.3 12.2
9050 2 M6x10 M6x20 M6x20 M8x20 M8x20 M8x20 M10x25
4.7 Mechanical seal
Guidelines for assembly and adjustment of the mechanical seal – pump types GS, GG and GD.
4.7.1 General
• All personnel responsible for maintenance, inspection and assembly must be adequately
qualified.
• Use specific instructions coming with the mechanical seal which is to be assembled/adjusted.
• The assembling and adjusting of mechanical seals must be performed in a clean workshop.
• Use technically appropriate tools that are in good condition. Handle them correctly.
4.7.2 Preparation
Check if the mechanical seal to be mounted has the appropriate size and construction and verify
if it can be assembled according to the following instructions:
• Adjusting dimensions are based on standard EN12756 (DIN24960) mechanical seals, on
standard axial clearance and standard pump parts.
• With pump versions GS, GG (except sizes TG H2-32 and TG H3-32) the length of the
first mechanical seal can be equal to that of EN (DIN) L1K (short version) or that of EN (DIN)
L1N (long version). The second mechanical seal of version GG always has a short length equal
to DIN-L1K. The TG H2-32 and TG H3-32 allow only short L1K EN12756 (DIN24960)
mechanical seals.
• Version GD always has both mechanical seals with the short length equal to EN (DIN) L1K.
• If the mechanical seal length is not according to EN12756 (DIN24960) the built-in length and
distance have to be recalculated (with the aid of data given in table 4.7.7.1).
• With double mechanical seal version GD (back to back) problems can occur when assembling a
seal which is shorter than L1K. In such cases some parts will have to be changed.
• Assemble the mechanical seal with pump in a vertical position with the pump cover downwards.
Follow the assembling sequence as described below.
• The mechanical seal has to be adjusted without axial clearance between pum pcover and rotor.
Both rotor and shaft are pushed against the pum pcover.
- The standard axial clearance is included in the adjusting distance X and Y (for X see table
4.7.7.1 and for Y see table 4.7.3).
- Check the shaft surface. Protect any sharp edge with tape or any other appropriate tool.
4.7.3 Special tools
• Conical protection bush (9010).
• Adjusting plate for adjusting distance Y=1 mm (9020) for version GG.
• Adjusting tools for adjusting distance Y (9040) for version GD.
• Adjusting blocks of different height to compose adjusting height X (versions GS and GG).
• Set of tap bolts for temporary fixation of the seal cover or tools (9030 and 9050).
• Recommended lubricant: OKS477 (also appropriate for EP rubber)
• Shammy
Used symbols:
A: Measuring distance from bush bearing to casing
X: Adjusting distance to be measured from first mechanical seal with GS and GG (see table 4.7.7.1)
Y: Adjusting distance from second mechanical seal with GG and GD (see table 4.7.3)
Special tools for assembly of mechanical seal