Cashco DA1 Bedienungsanleitung PDF herunterladen

INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)

IOM-DA1

11-13

I. DESCRIPTION AND SCOPE

The Model DA1 is a pressure reducing regulator used to control downstream (outlet or P2) pressure. Sizes are

1/2" (DN15), 3/4" (DN20), 1" (DN25), 1-1/4" (DN32), 1-1/2" (DN40), 2" (DN50), 3" (DN80) and 4" (DN100).

With proper trim uti li za tion, the unit is suitable for liquid, gaseous, or steam service. Refer to Technical Bulletin

DA1-TB for design conditions and selection recommendations. (NOTE: This product was formerly identiﬁ ed as

a Model D1; a Model DA1 and D1 are one and the same product.)

MODEL DA1

DA1 - DIRECT-ACTING, SPRING LOADED

PRESSURE REDUCING REGULATOR

SECTION I

II. REFERENCES

Refer to Technical Bulletin DA1-TB and DAG-TB for

tech ni cal speciﬁ cations of a Model DA1 regulator.

ABBREVIATIONS

CCW – Counter Clockwise

CW – Clockwise

ITA – Inner Trim Assembly

III. INSTALLATION

pipe line debris from entering valve and damaging

internal “soft goods”, primarily the dynamic seal(27)

and the V-TFE seat (21) when applied.

4. Downstream Sensing Installation Considerations

– Internal or External Sensing:

a. The regulator may be installed with inter-

nal or external sensing. Unless otherwise

speciﬁ ed, the regulator is supplied by factory

with internal sensing. The regulator may be

con vert ed in the ﬁ eld to external sensing (see

Section VII Maintenance, Paragraph H).

b. Reference DAG-TB, Table DAG-11 for recom-

mendations for applying external pressure

sensing.

c. For internal sensing, no external line is re-

quired. For external sensing, use an external

control line. The line is connected from the port

(1/4" NPT) on the side of the body di a phragm

ﬂ ange (see port 5 in Fig. 5) to a pres sure tap

10 to 15 pipe diameters downstream of the

reg u la tor. Use 1/4" or 3/8" outer di am e ter

tubing or 3/8" (DN10) pipe hav ing an inner

di am e ter equiv a lent to schedule 40 pipe.

d. For condensable vapors (i.e. steam) slope the

external sensing line downward 2 to 5 de grees

to outlet piping to prevent water pock ets,

SECTION III

SECTION II

For welded installations, all internal trim parts, seals

and diaphragm(s) must be removed from reg u la tor

body prior to welding into pipeline. The heat of

fusion welding will dam age non-metallic parts if

not re moved. NOTE: This does not apply to units

equipped with extended pipe nip ples.

CAUTION A

1. Regulator may be rotated around pipe axis 360

degrees. For ease of maintenance, the recom-

mended position is with the spring chamber (4)

upwards. In liquid service it is recommended that

the spring cham ber (4) be oriented downwards, and

that a cus tom er supplied and installed vent valve

be pro vid ed at the external sensing con nec tion to

bleed-off trapped gas/air under the di a phragm.

2. Provide space below, above, and around reg u la tor

for removal of parts during maintenance.

3. Install block valves and pressure gauges to pro-

vide means for adjustment, operation, bypass,

or removal of the regulator. A pipeline strainer

is recommended before inlet to remove typical

1 2 3 4 5 6 ... 15 16

Inhaltsverzeichnis

Seite 1 - MODEL DA1

INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM) IOM-DA111-13I. DESCRIPTION AND SCOPEThe Model DA1 is a pressure reducing regulator used to

Seite 2

IOM-DA110values. DO NOT ALLOW PLUG (20) TO ROTATE AGAINST SEAT RING (21) DURING TIGHTENING.plug (20). NOTE: For multiple di a phragms (9) that include

Seite 3 - SECTION VII

11IOM-DA19. Metal Diaphragm Designs:a. Install new diaphragm gasket (37) onto body (23) diaphragm ﬂ ange.b. Position diaphragm(s) (9) onto body&apo

Seite 4

IOM-DA112SECTION VIIIVIII. TROUBLE SHOOTING GUIDEWhen trouble shooting this regulator there are many possibilities as to what may be causing problems.

Seite 5 - WARNING 1

13IOM-DA13. Downstream pressure will not reach desired setting. 4. Diaphragm continually breaks (steam service regulators). 5.

Seite 6

IOM-DA114Figure 5: Location of Auxiliary Ports2175NEW REPLACEMENT UNIT:Contact your local Cashco, Inc., Sales Rep re sen- ta tive with the Serial Numb

Seite 7 - Not supplied. Use any

15IOM-DA1 Item No. Description 1 Adjusting Screw 2 Adjusting Screw Lock Nut 4 Spring Chamber 5 Spring Follower (Button) 6 Range Spring 7

Seite 8

Item No. Description 1 Adjusting Screw 2 Adjusting Screw Lock Nut 4 Spring Chamber 5 Spring Follower (Button) 6 Range Spring 8 Upper

Seite 9

IOM-DA12 which allows the diaphragm chamber to always be self draining. The external sensing line may be sloped upward for liquids or gases.CAUTIO

Seite 10

3IOM-DA19. Develop system ﬂ ow to a level near its expected normal rate, and reset the regulator set point by turning the adjusting screw CW to increa

Seite 11

IOM-DA14Figure 1: Dynamic Side SealsType OR — O-RingDynamic SealType CW — TFE CapDynamic Seal + WiperType CP— TFE CapDynamic SealType PR — PRADynamic

Seite 12 - VIII. TROUBLE SHOOTING GUIDE

5IOM-DA113. Evenly loosen the three cage cap screws (18) in single revolution increments. If the reg u la tor con tains a lower

Seite 13

IOM-DA16from the upper end of the cage (19).c. Remove o-ring middle stem seal (14.2) from piston-guide bearing (13).d. Examine the com po nents (27.

Seite 14 - SECTION IX

7IOM-DA13. QC Requirements:a. Valve plug (20);1. 16 rms ﬁ nish on its seating surface for tight shutoff.2. No major defects on bottom guide spin dle

Seite 15 - (w/Wiper Seal)

IOM-DA184. Position piston-guide bearing (13) over and into upper end of cage (19) until the cap seal (27.1) edge touches the upper lip of the cage (

Seite 16 - Metal Diaphragm

9IOM-DA1e. Type PW:1. Place wiper washer (17.1) into “cup” of Wiper Seal (16). Holding these parts (17.1 & 16) between thumb and foreﬁ nger, in s

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