SPX TG H15-50, Instruction Manual, Page: 74 / 110

74
Y
(9020)
bolts (9030)
0040 0030 0010 0701 0702
0700
1200 3040 0020 3010 2200
3030
2420
1100 0602 0601
0600
Bc 2080 2080 3020 2400
A.0500.351 – IM-TGH/07.02 EN (10/2015)
4.7.7.2 GG – Double mechanical seal tandem
1. Assemble the first mechanical seal using the same procedure as a single mechanical seal, type
GS (see section 4.7.7.1).
2. Fix the mechanical seal cover (2200) with 2 bolts (9030) without tightening them. Leave the
gasket (2080) uncompressed.
3. Place 2 distance plates (9020) of 1 mm thickness (Y=1 mm) on the sealing cover (not for
TG H2-32 and TG H3-32, if Y=0).
4. Assemble the second mechanical seal (3020).
5. Remove the distance plate (9020) and the two bolts (9030).
6. Mount second gasket (2080) and mechanical seal casing (2400).
4.7.7.3 GD – Double mechanical seal “Back-to-back”
1. Assemble pump casing (0010) with pump cover (0030), idler complete (0600), rotor with shaft
(0700) and pre-assembled intermediate casing (0020).
2. Tighten bolts (0040/0210 and 1200).
3. Pre-mount the stationary seats into the intermediate casing (0020) and into the seal cover
(2400).
4. Place the pump in a vertical position with pump cover downwards and push both rotor and shaft
against the pump cover.
5. Fit the lock ring (3050) if any.
6. Check the smoothness of the seal faces. Clean the face if necessary.
7. Lubricate the faces with a drop of thin oil or pumped liquid. Do not lubricate a carbon face!
8. Mount the rotating seal part of the first mechanical seal (3010).
9. Adjust the seal length on distance Y by means of a special U-shaped tool (9040).
(See 4.7.3 Special tools).
Assembly of double mechanical
seal in tandem (GG)