Groth 2000A Manual de usuario descargar pdf (Pagina 14)

second nut from the stem. Slowly raise the

spring button to release the spring

compression. The spring force will be in 5 – 30

lb range, depending on vacuum setting.

7. Using weight plate handles, if included, lift pallet [2]

with attached assembly and remove vacuum pallet-

stem [23, 14] assembly from the bottom.

8. Remove the nuts on the weatherhood posts

holding the stem guide [17]. Note: For low

pressure settings, a weight plate is added on the

stem guide [17].

9. Lift the spacers [12]. Remove the nuts above the

water dam [28]. Note: Water dam is only used if

weight plate is mounted directly on pressure pallet

[2].

10. Remove the weatherhood posts [27] by loosening

the nuts beneath the pallet.

11. Remove the hinge arm [4] by loosening the

fasteners [7, 8].

12. Carefully lift the weight plate [29] vertically.

Caution: This may require a crane due to the

weight. (See Warning on page 4.)

13. Turn pallet assembly upside down (Figure 16).

14. Remove remaining bolts, nuts, and washers [7, 9,

19, 20, 21] to separate the vacuum seat.

15. Lift the retainer plate [3] and diaphragms [10] from

the pressure pallet.

2450 Assembly

Rebuild the valve reversing the disassembly steps.

1. Begin by placing the pallet [2] upside down on

support blocks evenly spaced or on a pipe.

2. Wipe clean “air cushion” groove (seat area) in pallet.

3. Center diaphragms [10] (qty 2) on pallet. See

Figure 3 for orientation of diaphragms, if elastomer

is used.

Figure 15: Loosening Nuts for Spring

Figure 13: Pallet Support (2450A)

Figure 14 : Vacuum Spring Compression

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Groth 2000A Manual de usuario Pagina 14