Flowserve Valtek Mark 10 Survivor Control Valves Instrukcja Użytkownika Pobierz pdf (Strona 18)

Valtek Mark 10 Survivor Control Valves FCD VLENIM0036-05 – 07/09

5.2.9.10. Stroke the valve open. Turn the plug back into the actuator stem one quarter turn.

This will ensure that the plug will not contact the seat during operation.

5.2.9.11. Remove the seat ring from the body. Set and tighten the stem clamp.

5.2.10. Valves with separate seats (and no seat ring bolts)

5.2.10.1. Place a ﬂange gasket, seat ring and ﬁnally seat ring gasket onto the downstream

pipeline.

5.2.10.2. Retract the valve plug and carefully lower the body/actuator assembly onto the seat

ring and gasket.

CAUTION: a Be careful to not strike the plug head against any object during this process.

5.2.10.3. Insert the upstream ﬂange gasket, ﬂange and piping. Slowly stroke the valve to its

closed position to center seat ring in pipe line. Install the ﬂange bolting and tighten

per industry standards.

5.2.11. Valves with bolt on seats

Just before installing the valve in line follow these steps to center the seat ring:

5.2.11.1. Place the valve in an upright position. Place the seat ring and seat gaskets into the

valve body.

5.2.11.2. Slowly stroke the valve to its closed position. Stroke the valve several times to center

the seat ring. Retract the plug and tighten the seat ring bolting.

5.2.11.3. Take care not to bump or move the seat ring during assembly into the line. If the seat ring

is moved during installation, remove the valve and repeat steps 5.2.12.1 to 5.2.12.1.2.

Table I: Common Packing Lubricants

Lubricant Manufacturer

Temperature Range

Description / Applications°F °C

Krytox E.I. DuPont -5 to 550 -20 to 287 Fluorinated general purpose grease;

handles common liquids and gases;

good lubricity in harsh mediums;

nonﬂammable, chemically inert;

won’t harm plastic or metal parts

GP-460 Acheson 32 to 1000 0 to 537 Anti-seize lubricant containing high

purity graphite in petrolatum.

Table II: Suggested Bonnet Bolting Torque Values

Bolt Size (in.)

Nut/Stud Material

Carbon Steel Stainless Steel

ft-lb, ±10% N m, ±10% ft-lb, ±10% N m, ±10%

80 108 50 68

¾ 140 190 90 122

230 312 150 203

1 350 475 220 298

510 691 330 447

1 ¼ 730 990 460 624

990 1342 630 854

1 ½ 1320 1790 840 1139

1 2 ... 13 14 15 16 17 18 19 20

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Flowserve Valtek Mark 10 Survivor Control Valves Instrukcja Użytkownika Strona 18

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