Instruction Manual

Instruction Manual

D100391X012

EDR and ETR Valves

April 2011

2. Apply the lapping compound to the seating surfaces. Rotate the handle alternately in each direction to lap the

seats. After lapping the seats, remove the valve plug and stem, then clean all parts. Repeat the lapping procedure if

necessary.

Trim Assembly

Carefully clean all gasket surfaces. Use new gaskets during reassembly of the valve.

Table 3. Valve Body‐to‐Flange Nut Torques

(3)

VALVE

SIZE,

NPS

TORQUES

(1)

SA193‐B7 SA193‐B8M

(2)

NSm LbfSft NSm LbfSft

1 and 1‐1/4 129 95 64 47

1‐1/2, 1‐1/2 x 1, 2, or 2 x 1 96 71 45 33

2‐1/2, 2‐1/2 x 1‐1/2, or 3 x 1‐1/2 129 95 64 47

3, 3 x 2, 3 x 2‐1/2, or 4 x 2 169 125 88 65

4, 4 x 2‐1/2, or 4 x 3 271 200 156 115

1. Determined from laboratory tests.

2. SA193‐B8M annealed.

3. For other materials, contact your Emerson Process Management sales office.

Replacing the Seal or Piston Ring

CAUTION

Be careful not to scratch the surface of the ring groove in the valve plug (key 2), or the new ring may not seal properly.

D For EDR, if the piston ring (key 6) is visibly damaged, remove the ring and replace it with a new part. Refer to the

Parts List at the end of this manual for a replacement part.

D For ETR, if the seal ring and backup ring (keys 24 and 25) are visibly damaged, remove the rings by prying or cutting

them from the groove. Be careful not to scratch valve plug surfaces. Refer to the Parts List at the end of this manual

for replacement parts.

Assembling the Valve Plug and Stem

1. For EDR and ETR, perform the following steps:

D Insert the stem (key 7) into the plug (key 2, figure 3) and thread the castle nut (key 8) onto the end of the stem and

hand tighten.

CAUTION

To prevent possible product damage, take care that the stem and plug are not damaged during the following tightening

procedure.

D When tightening the castle nut with a wrench, line up the hole in the end of the stem with a slot in the castle nut.

Ensure that the stem and plug are not damaged during the tightening procedure.

D Insert the cotter pin (key 30) and lock it in place.