Flowserve Cast Globe Valves User Manual

INSTRUCTION MANUAL

Anchor Darling Cast

Sizes 2-1/2” through 24”

FCD ADENIM0011-00

lobe Valves

Installation

Operation

Maintenance

Table of Contents

1.0

VALVE DESCRIPTION Page

1.1 Recommended Uses..................................................6

1.2 Principles of Operation...............................................6

1.3 Design Features ......................................................7

1.3.1 Bodies ......................................................7

1.3.1 Bonnet Seals ...............................................8

1.3.2 Disc Assembly and Seats............................9

1.3.3 Actuation......................................................9

2.0

CARE OF VALVE PRIOR TO INSTALLATION

2.1 Receiving Inspection................................................10

Globe Valves FCD ADENIM0011-00

2.2 Handling ................................................................ 10

2.3 Storage ................................................................10

3.0

INSTALLATION INSTRUCTIONS

3.1 Rigging ................................................................... 11

3.2 Cleaning ...................................................................11

3.3 Installing Valve In Line .............................................11

4.0

OPERATING THE VALVE

4.1 Hand Actuated .......................................................12

4.2 Motor Actuated .......................................................12

4.3 Throttling .......................................................12

4.4 Isolating .......................................................12

4.5 Operating Tips ........................................................13

5.0

VALVE MAINTENANCE

5.1 Inspection.................................................................14

5.2 Lubrication ...............................................................14

5.3 Cleaning ...................................................................14

5.4 Packing ...................................................................15

5.5 Bolting Torque Values..............................................16

5.6 Refinishing Sealing Surfaces ...................................17

Table of Contents

(continued)

6.0

DISASSEMBLY Page

6.1 Actuator Removal.....................................................17

6.1.1 Handwheel.................................................18

6.1.2 Gear...........................................................19

6.1.3 Electric Motor.............................................20

6.2 Flanged Bonnet Valves............................................20

6.2.1 Packing ....................................................20

6.2.2 Yoke ....................................................21

6.2.3 Bonnet ....................................................22

6.2.4 Disc and Stem ...........................................23

6.3 Pressure Seal Bonnet Valves ..................................24

Globe Valves FCD ADENIM0011-00

6.3.1 Yoke ....................................................24

6.3.2 Bonnet ....................................................25

6.3.3 Disc and Stem ...........................................29

7.0

ASSEMBLY

7.1 Flanged Bonnet Valves............................................30

7.1.1 Disc and Stem............................................30

7.1.2 Bonnet........................................................30

7.1.3 Yoke...........................................................31

7.2 Pressure Seal Bonnet Valves ..................................31

7.2.1 Disc and Stem............................................31

7.2.2 Bonnet........................................................31

7.2.3 Yoke...........................................................32

7.3 Actuators..................................................................32

7.3.1 Manual Actuators.......................................32

7.3.2 Air Cylinder and Motor...............................32

Revision Sheet

Revision Date Changes Description

- 9/19/2005 Original Issue

Globe Valves FCD ADENIM0011-00

Globe Valve Designs

Globe Valves FCD ADENIM0011-00

1.0 VALVE DESCRIPTION

1.1 Recommended Uses

Anchor/Darling Globe valves are designed primarily to regulate the volume of flow within a piping system. With the

appropriate disc (for the service) installed, they will throttle fluids with minimal erosion and cavitation. By taking certain precautions they may also be used for isolation purposes.

1.2 Principles of Operation

The principle parts of a globe valve are the body, bonnet, disc and topworks (Fig. 1). The body and bonnet contain the

fluid within the system. The disc is positioned by the stem in the flow path above the seat. Movement of the stem (in line with the flow) increases or decreases the annular area between the disc and seat, metering the volume of fluid that passes between them. When used for isolation purposes the disc to seat seal is created by either a mechanical or an internal pressure force. When installed with flow under the disc, the stem and topworks provide a mechanical thrust that holds the disc into the seat against the fluid pressure. With flow over the disc, the differential pressure itself forces the disc into the seat. The latter situation with the line pressure working towards the seal rather than against it, provides for

more reliable isolation.

FIGURE 1

Globe Valves FCD ADENIM0011-00

1.0 VALVE DESCRIPTION

1.3 Design Features

1.3.1 Bodies

Anchor/Darling Globe valves are supplied in four different body styles (Fig. 2). Regular (or Horizontal) Pattern, Y

Pattern, Angle Pattern and Elbow Down (or Y-Angle) Pattern. While all the bodies incorporate the same operating principles their various configuration allow them to be installed in a variety of piping configurations

(Continued)

FIGURE 2

Globe Valves FCD ADENIM0011-00

1.0 VALVE DESCRIPTION

1.3 Design Features (Continued)

1.3.2 Bonnet Seals

Anchor/Darling Globe valves are supplied with two basic types of bodybonnet closures: bolted bonnet or pressure

seal. The bolted bonnet closure (Fig. 3) is a bolted flange tongue and groove joint with spiral-wound stainless steel gasket and asbestos filler. The seal depends upon the bolt preload to maintain sufficient compressive force on the gasket.

Pressure seal type closures (Figs. 4 & 5) utilize a tapered soft metal ring gasket for sealing. The gasket is contained within the body neck bore by a retaining ring. The tapered inner surface of the gasket bears against a mating annular surface on the valve bonnet. Under internal pressure, the bonnet is forced against the pressure seal gasket, wedging it against the body neck wall. A slight interference angle produces a line contact and high sealing pressure. The greater the valve pressure the tighter the metal-ta-metal seal. No bolting is required to maintain the seal although the bonnet is initially drawn into contact with the pressure seal by cap screws.

(Continued)

FIGURE 3 FIGURE 4

FIGURE 5

Globe Valves FCD ADENIM0011-00

1.0 VALVE DESCRIPTION

1.3 Design Features (Continued)

1.3.3 Discs and Seat

Anchor/Darling Globe valves are supplied with a wide variety of discs to handle various throttling requirements. All

of the discs, however, are variations of three basic types (Fig. 6)

Quick Opening - for moderate throttling Cage - for more severe throttling Parabolic - for linear flow control

Anchor/Darling Globe valve discs incorporate a disc skirt to prevent cocking and to ensure proper disc/seat

alignment regardless of installation orientation. The globe valve main seat consists of a hard surfaced ring set into a recess in the body which supports and retains it. A seal weld is provided between the body and the rings. This weld is for sealing only and serves no structural purpose. The seat ring is replaceable.

There is a 1 degree difference in the angle on the disc and seat sealing surfaces (fig. 7). This design provides for

line contact at the seal and tight sealing at low force.

1.3.4 Valve Actuation

A globe valve is operated by moving the disc in and out of the seat with the stem. The necessary thrust for

opening or closing is imparted to the stem by the valve actuator which is supported and restrained by the yoke structure. Five types of actuators are normally supplied: handwheel, manual gear, electric motor, pneumatic cylinder and hydraulic cylinder. The first three impart rotary motion to a stem nut which converts the rotary motion to linear stem movement via the ACME stem threads. The pneumatic and hydraulic cylinder actuators provide direct linear motion to the stem.

Sealing of the bonnet stem penetration is accomplished by a bolted gland stuffing box containing ring-type

packing.

(Continued)

FIGURE 6 FIGURE 7

Globe Valves FCD ADENIM0011-00

2.0 CARE OF VALVE PRIOR TO INSTALLATION

2.1 Receiving Inspection

Upon receipt of the valve, thoroughly inspect it for shipping damage. As a minimum, the following items should be

checked:

1. Handwheel and shaft-check for bending or impact damage.

2. Switches and actuating mechanisms bent or broken parts?

3. Missing or loose bolting?

4. End covers in place?

5. Is valve securely fastened to shipping skid?

6. Abrasion-damaged paint?

7. Are spare parts shipped with valve in place and secure?

2.2 Handling

2.3 Storage

Store valves on their shipping skids in a clean dry area protected from weather. Anchor/Darling valves are shipped

Anchor/Darling valves are shipped strapped to wooden skids designed to be moved by forklift. It is recommended that when being handled prior to installation, the valve be kept on its skid and a forklift truck be used for moving. If an overhead crane is used, care must be exercised to center the load. The slings should not lift the valve by the wooden skid structure alone, but must pass under the valve.

without the permanent packing installed. Experience indicates that stem corrosion pitting can result when valves are stored with the packing in place. For this reason we do not recommend installing the packing until valve is to be put in service. The service packing is shipped with the valve, contained in a plastic bag placed in the valve port or attached to the yoke. lithe packing is removed for storage elsewhere, reseal the valve end covers to protect the internal cleanliness of the valve. Motor actuated valves, if stored for more than a few months require special care of the operator. Motor and switch compartment heaters, if supplied, should be connected. The major concern is condensation on the internal parts of the actuator. For this reason, rapid and/or extreme temperature and humidity changes should be avoided. Storage in a temperature and humidity controlled environment is desirable. Long term storage of motor actuators may affect the terms of the warranty and the actuator manufacturer should be contacted for specific information.

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