Flowserve XL Series High-Performance Positioner Manuel d'utilisateur télécharger pdf

Valtek No. 10077320

45-1

GENERAL INFORMATION

This bulletin is designed to assist in installing, calibrat-

ing, troubleshooting and performing maintenance as

required for the Valtek

XL Series high-performance

positioner.

Product users and maintenance personnel should thor-

oughly read and strictly follow the instructions con-

tained in this bulletin prior to operating the positioner.

Any questions concerning this product should be di-

rected to a Flowserve representative.

To avoid possible injury to personnel or dam-

age to valve parts, WARNING and CAUTION

notes must be strictly followed. Modifying this

product, substituting non-factory parts or us-

ing maintenance procedures other than out-

lined could drastically affect performance and

be hazardous to personnel and equipment.

The XL high-performance positioner is a two-stage

device and is designed for use in control loops where

fast response is required. The XL positioner is designed

to be modular and use the P/P module for 3-15 psi input

signal or the NT 3000 Series Transducer Module for

4-20 mA input signal.

The XL high-performance positioner is designed as a

four-way device, but can easily be converted to a three-

way device by plugging one of the output ports.

NOTE: The XL high-performance positioner must

use the I/P NT 3000 Transducer. The I/P 2000 Trans-

ducer is not acceptable for use with the XL Series

Positioner.

The XL positioner can handle supply pressures up to

150 psi; thus, a supply regulator is usually not required.

However,

a five micron air filter is required for pneu-

matic positioners and a coalescing filter is required for

I/P positioners.

NOTE: The air supply should conform to ISA

Standard S7.3 (a dew point at least 18

F / -8

below ambient temperature, particle size below 5

microns, oil content not to exceed one part per

million).

The XL Series positioner features an adjustable gain of

400-1100:1. The medium gain setting is standard on

size 25 actuators, while the high gain setting is standard

on size 50 and larger actuators (refer to ‘Gain Adjust-

ment Procedure’ section for further details.)

All positioners come with one of two types of cams:

a linear characteristic cam for use on linear actuators or

a combination linear / modified equal percentage

characteristic cam for rotary actuators. Refer to the

‘Rotary Actuator Cam Characteristic’ chart on page 4 for

specific installed characteristics.

POSITIONER OPERATION

The positioner schematic (Figure 1) shows an XL Series

positioner connected for double-acting service on a

linear actuator. Tension on the feedback spring pro-

vides feedback to the positioner, which varies as the

stem position changes. The spring-loading force is

applied through the feedback linkage and cam to the

positioner’s input capsule.

Instrument signal pressure is applied between the dia-

phragms in the input capsule. Therefore, the input

capsule serves as a force-balance member, matching

the valve stem position (as measured by tension on the

feedback spring) to the instrument signal.

When the opposing forces balance exactly, the system

will be in equilibrium and the stem will be in the exact

position called for by the instrument signal. If the oppos-

ing forces are not in balance, the input capsule will move

up or down and, by means of the pilot-valves, will

Valtek XL Series

High-Performance

Positioner

1 2 3 4 5 6 ... 15 16

Résumé du contenu

Page 1 - Positioner

Valtek No. 1007732045-1GENERAL INFORMATIONThis bulletin is designed to assist in installing, calibrat-ing, troubleshooting and performing maintenance

Page 2

45-10Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611100 90 80 70 60

Page 3

45-11Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611100 90 80 70 60

Page 4 - Characteristics

45-12Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611Troubleshooting XL PositionersFailure Probable Cause Corrective ActionValve

Page 5 - Positioner Balance Adjustment

45-13Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611Figure 17: Positioner--Exploded ViewAA Pilot relay assembly1 Base assembly2

Page 6 - 64-inch Allen wrench

45-14Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611Rotary ActuatorsWhen ordering a positioner for a rotary actuator, selecttwo

Page 7 - Positioner Maintenance

45-15Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611Standard O-ring Kit – Part No. 10094526Item No. Description Quantity 8 Relay

Page 8 - Orifice Screw

Page 9

45-2Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611 Size 25, 100, 200 Size 50Figure 2: Positioner Mou

Page 10 - Percent Signal (Air-to-Open)

45-3Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611RollerBearingCamStartPositionCamFollower ArmNOTE: When retrofitting the XL po

Page 11

45-4Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611positioner. Figures 11 through 16 show the shaftrotation versus instrument si

Page 12

45-5Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611Output 1Zero AdjustmentLock KnobCam FollowerArm (Range Arm)Output 2BalanceAdj

Page 13

45-6Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611Grounding ScrewZeroAdjustmentSpanAdjustmentMinimum PressureCutoff AdjustmentS

Page 14

45-7Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 86111. Connect the I/P module to a supply pressure be-tween 30 to 150 psi.2. Remo

Page 15

45-8Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611damage the seating surface or O-rings.14. Reinstall the poppets (28), poppet

Page 16

45-9Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611100 90 80 70 60