Emerson 66R Bedienerhandbuch PDF herunterladen (Seite 5)

Types 66R and 66RR





Relief valve parts are subject to normal wear and must

be inspected and replaced as necessary. The frequency

of inspection and replacement of parts depends upon the

severity of service conditions and the requirements of local,

state, and federal regulations.









  



  

  





This section gives procedures for complete disassembly

and assembly of the relief valve or main valve body.

Disassemble the valve only as far as required to gain

access to the necessary parts. Then, begin the “Assembly”

procedure at the appropriate step. Key numbers for the

Type 66R relief valve are referenced in Figure 6 and, for the

Type 66RR main valve, in Figure 7.

















Disassembly

1. With a Type 66RR relief valve, disconnect the pilot

control and/or vent lines.

2. Loosen the locknut (key 45) if used, and remove the

closing cap (key 27) and closing cap gasket (key 26).

3. In order to facilitate resetting spring compression during

assembly, be sure to note the position of the adjusting

screw (key 25) before removing it. Then, turn the

screw out of the spring case (key 2) to remove spring

compression, and remove the upper spring seat

(key 24), spring (key 6), cap screws and nuts (keys 21

and 22), and spring case.

4. Unscrew the stem nut (key 23) from the top of the stem

(key 13). To keep the stem from twisting, lift the

diaphragm (key 5) and attached parts far enough to hold

the stem with an open-end wrench. Or, remove the

pipe plug (key 31, not shown) from the side of the

body opposite the arrow, and insert a 5/16-inch

(7,94 mm) or smaller rod through the pipe plug hole

and the hole in the stem.

5. Remove the spring seat washer (key 36) if used,

lower spring seat (key 17), stiffener plate (key 39) if

used, upper diaphragm plate (key 4), diaphragm

(key 5), lower diaphragm plate (key 15), stem gasket

(key 18), diaphragm spacer (key 16) if used, and another

stem gasket and lower diaphragm plate if used. With a

high-temperature uorocarbon (FKM) diaphragm, remove

the diaphragm gasket (key 66, not shown) that goes

between the diaphragm and diaphragm case (key 3).

6. Remove the cap screws (key 20) and washers (key 34)

that attach the diaphragm case to the body (key 1).

7. Remove the diaphragm case and diaphragm case

gasket (key 35). Depending on construction, remove

either the stem guide (key 41) or the sealing diaphragm

(key 14) and last lower diaphragm plate (key 15) and

stem gasket (key 18). If used, remove the rod from the

stem and the pipe plug hole in the body.

8. Lift out the stem and attached parts.

9. Unscrew the stem nut (key 23) from the bottom of the

stem, and remove the valve plug skirt (key 10), O-ring

(key 8), O-ring retainer (key 9), and seal washer (key 37).

10. Slide a seat ring puller, T-wrench, or other suitable tool

over the seat ring (key 11). Engage the tool with the

seat ring lugs. Unscrew the seat ring.

11. If necessary to replace the bottom ange gasket

(key 19), remove the cap screws (key 20), bottom

ange (key 7), and gasket.

Assembly

1. Apply pipe compound to the threads of the seat ring

(key 11). Screw in the seat ring, using a seat ring puller

or similar device. Wipe off any excess pipe compound.

2. Place the seal washer (key 37), O-ring retainer (key 9),

O-ring (key 8), and valve plug skirt (key 10) on the stem

(key 13) in the order shown in Figure 6 or 7.

3. Secure the stem nut (key 23) to the stem. Install the

stem and attached parts into the body.

4. If necessary, install a new bottom ange gasket (key 19)

and the bottom ange (key 7) on the valve body. Secure

the ange with the cap screws (key 20).

5. Depending on construction, either install the stem guide

(key 41) on the body, or install the stem gasket (key 18),

lower diaphragm plate (key 15), and the sealing

diaphragm (key 14) on the stem. Make sure that on a

sealing diaphragm, the diaphragm holes are aligned

with the body ange holes.

1 2 3 4 5 6 7 8 9 10 11 12

Types 66R and 66RR 1

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