Emerson Betis E Series Manuale operativo

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DESCRIPTION DWG. NO PAGE

I GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

II INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

III MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

IV MODEL IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

V DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

DRIVE CASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

INSPECTION AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

VI ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

DRIVE CASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

VII LINEAR OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

TRAVEL STOP ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

VIII TESTING AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . 9

IX SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

FIGURE 1 - SERIES 35 THRU 70 CYLINDERS . . . . . . . . . . . . . . . . . . . 11

FIGURE 1 - PARTS LIST, SERIES 35 THRU 70 . . . . . . . . . . . . . . . . . . . 12

FIGURE 2 - SERIES 3, 5 AND 7 CYLINDERS . . . . . . . . . . . . . . . . . . . . 13

FIGURE 2 - PARTS LIST, SERIES 83 THRU 143,

85 THRU 185, 127 THRU 187 . . . . . . . . . . . . . . . . . . . . . . . 14

GATE VALVE OPERATOR AND PARTS LIST . . . . . . . . . . . . . . .CB0273 15

X NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page One

E-Series Rotary and

Linear Operations

E-Series Rotary and Linear Operations

IGENERAL

Bettis “E-Series” linear operators are cylinders adapted to gate and globe valves and the like. Bettis “E-

Series” quarter turn operators use a scotch yoke mechanism to convert piston motion to a 90° rotation.

II INSTALLATION

Place operator and valve in the same position (both open or both closed) and both safely maintained in that

position (ie. line depressurized for gate and butterfly valves). Remove valve lever, handwheel or gear, per

valve-manufacturer instructions. Check mounting surfaces, coupling, and orientation of the operator to the

valve for any discrepancy. Set operator in position on the valve, and install all bolts and nuts. Align the opera-

tor to the valve stem while bolts are somewhat loose, then tighten bolts/nuts evenly and completely to

mechanics standard torque or specifications (Page 10). Adjust operator end stops for fully open and fully

closed positions, ensuring operator, not valve stops, absorb the load, except in special cases per valve-man-

ufacturer explicit instructions.

NOTE: Operators shipped with valves have the end stops set at the factory, and should not require

further adjustment.

III MAINTENANCE

The only servicing expected under normal operating conditions is O-ring and gasket replacement. Only cylin-

der disassembly is necessary for O-ring and gasket replacement, but full disassembly instructions will be

provided by this manual. Tools and material required are:

- a set of standard sized wrenches

- snap ring pliers

- a pair of 10” or longer screwdrivers

- petroleum grease

- Dow Corning 55M grease or equivalent

- a tube of sealant (eg. silicone)

- commercial solvent (eg. varsol)

- leak detecting fluid (eg. soapy water)

All part numbers referred to are listed on the schematic diagrams Fig. No. 1 and No. 2. O-rings, gaskets and

other soft parts, are available from the factory as repair kits. Lubricant also available from factory.

Please contact the factory or representative for repair kits or additional information, and include the

complete serial number.

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Two

E-Series Rotary and

Linear Operations

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Three

E-Series Rotary and

Linear Operations

IV MODEL IDENTIFICATION

Series 35 thru 70 (Series 35, 50, 60 and 70) have a one piece drive case, with stem extended from top and

bottom. Refer to Fig. No. 1. The series numbers refer to piston diameter. (Eg. Model 50D refers to a double

acting operator with a 5” diameter piston.) The letters immediately following the series number refer to type

of operation:

“S” “S” Series use only one double acting cylinder. Singe acting. Pressure can be applied to one

side of the piston to move it in one direction only. Force for the return stroke is provided by the

opposing single acting piston or spring.

“D” “D” Series use two double acting cylinders. Double acting. Pressure may be applied to either

side of the piston to move it in either direction.

“SSR” Spring return, with one single acting piston acting against the spring.

“DSR” Spring return, with two single acting pistons acting against the spring.

“MJ” Suffix following any of the above indicates jackscrew.

“MH” Suffix following any of the above indicates hydraulic manual override.

Series 83 thru 163 (Series 83, 103, 123, 143, 163), Series 85 thru 185 (Series 85, 105, 125, 145, 165 and

185) and Series 127 thru 187 (Series 127, 147, 167, 187) have a two piece drive case, with the yoke fitted

directly over the valve stem or adaptor and keyed. Refer to Fig. No. 2. The series numbers refer to piston

diameter and lever arm. The letters immediately following the series number refer to type of operation.

“S” One double acting piston, the opposite end of the operator being simply a drive rod cover.

“D” Two double acting pistons.

“DSR” Spring return, with two single acting pistons acting against the spring.

“M” Suffix following any of the above indicates hydraulic manual override.

(Eg. Model 85D refers to a double acting operator with a 8” diameter piston and 5” lever arm. Model 127D

refers to a double acting operator with a 12” diameter piston and 7” lever arm.)

WARNING NOTE: Do not disassemble spring cartridge in spring return models. This unit is under

load and must be returned to the factory for service.

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Four

E-Series Rotary and

Linear Operations

VDISASSEMBLY

Cylinder Disassembly

1) Make sure no air pressure is being applied to the operator and then disconnect all piping to the operator.

All Models: Follow Steps 2 thru 7 for each cylinder until only the drive case remains intact. The same

procedure can be used for hydraulic cylinders but note that O-rings replace cylinder gaskets.

2) Remove jam nut (28), washer (27) and O-ring (26).

Spring Return (SR) Models Only:

Note 1: Spring return operators use a spring in one of the cylinders to provide a positive fail-safe action

in case of loss of air supply. At this time, identify the type of fail-safe action. Place the operator

with the yoke bore or stem nearest you, and vertical, with cylinders extended to the sides. A

spring cylinder (long cylinder) to the right side will open the valve on loss of air (eg. “fail-open”).

A spring cylinder to the left side will provide “fail-close” action.

Note 2: The end cap of the spring cylinder does not require O-ring (26) or gasket (19) seals. If disas-

sembly is required, carefully release the preload of the spring by slowly and evenly loosening

the stay rod nuts (24) until the spring pressure is released. Remove the spring cartridge from

the cylinder, taking care not to score the cylinder bore.

Warning: Do Not Disassemble Spring Cartridge.

The spring cartridge (29) thru (34) is a self-contained unit, with the spring held in the cartridge under

compression.

All Other Models:

3) Remove stay rod nuts (24), lockwasher (23), end cap (22) and gasket (19).

4) Remove cylinder (20).

5) Remove one or two stay rods (21) to allow removal of the piston. Leaving at least one stay rod in place

will prevent confusion during reassembly of spring return models. (See Warning Note above.)

6) Remove lock nut or capscrew (18). Remove piston (15), piston seal (17) and piston center O-ring (16).

7) Remove cylinder plate (12), gasket (19), drive rod guide (13) and drive rod seal (14).

Models 35S, 50S and Series 35 thru 70 Spring Return (SR) Models Only

Single acting cylinders do not require cylinder plate (12). Disregard Step 7.

Series 83 thru 163, 85 thru 185 and 127 thru 187 Only

Removal of cylinder plate (12) first requires removal of mounting screws (12a) and washers (12b).

Models 123S thru 165S, 125S thru 185S, and 167S thru 187S Only

One side of the operator is simply a drive rod cover and does not require disassembly. Disregard the follow-

ing unless complete disassembly is required. Remove mounting screws (38) and drive rod cover (37).

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Five

E-Series Rotary and

Linear Operations

Drive Case Disassembly

Series 35 thru 70 Only

8A. Remove drive rod (4) and roller assembly (5), (6) and (7). Remove snap rings (7). Remove drive

rollers (6) and drive pin (5) from drive rod.

9A. Remove cover screws (10) and cover (2).

10A. Remove indicator (11) after noting its original position. Remove yoke pins (3c) and snap rings

(3d). Remove stem (3b) and yoke (3).

11A. Remove stem bushings (8) and O-rings (9).

Series 85 thru 185 and 127 thru 187 Only

8B. Remove breather plug (1a). Remove snap rings (7). Access to the lower snap ring is through

breather hole with a pair of long screwdrivers. Remove drive rollers (6) and drive pin (5).

Remove drive rod (4).

9B. Remove cover screws (10) and yoke cover screws (11b). Remove yoke cover (11a) and indicator

(11) assembly after noting its original position. Remove drive case cover (2).

10B. Remove yoke (3) and thrust bearing (3a).

11B. Remove yoke bushing (8), drive rod guides (13) and O-rings (9).

Inspection and Cleaning

Check O-rings, bushings and gaskets for damage. Replace if necessary. Check cylinder bore for scoring.

Check metal parts for wear, corrosion and physical damage. All parts except gaskets should be cleaned with

varsol. Lubricate yoke slots, drive pin, rollers, bushings and guides with a light coating of grease. Lubricate

O-rings, gaskets and cylinder bore with a generous amount of Dow Corning 55M grease or equivalent.

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Six

E-Series Rotary and

Linear Operations

VI ASSEMBLY

Drive Case Assembly

1) Install bushings (8) and drive rod guides (13).

Series 35 thru 70 Only

2A. Install O-rings (9) on stem (3b). Assemble yoke (3) and stem in drive case (1). Install yoke pins

(3c) and snap rings (3d).

3A. Make up drive rod assembly (4), (5), (6) and (7). Slide drive rod into position between yoke

arms.

4A. Apply silicone sealant around edge of cover. Install cover (2) and cover screws (10). Replace

indicator (11).

Series 85 thru 185 and 127 thru 187 Only

2B. Install yoke thrust bearing (3a) on yoke (3). Install O-rings (9) in drive case cover (2) and drive

case (1). Install yoke (3) in drive case (1).

3B. Install drive rod (4), drive rollers (6), drive pin (5) and snap rings (7). Access to lower snap ring

is through breather plug (1a) hole.

4B. Apply silicone sealant around rim of drive case cover (2) and yoke cover (11a), and inside the

bolt pattern to make it weather tight. Install drive case cover (2) and yoke cover (11a) and indica-

tor (11) assembly. Install cover screws (10), yoke cover screws (11b) and breather plug (1a).

Cylinder Assembly

Spring Return (SR) Models Only

Identify fail-safe action desired before reassembly. See “DISASSEMBLY NOTE 1” page 4. Even tightening of

stay rods on spring end is essential to keep cylinder aligned to housing and drive rod. If possible, reassem-

ble with cylinder vertical. If not, support the spring cylinder while gradually and evenly tightening stay rod

nuts in an alternating program.

All Models

Proceed with Steps 5 thru 9 and repeat as necessary to reassemble all cylinders. Take care to align ports to

match any existing tubing.

5) Install drive rod seal (14) and gasket (19) in cylinder plate (12). Install cylinder plate over drive rod (4).

Models 35S, 50S, 35SSR and 50SSR Only

Single acting cylinders do not require cylinder plate (12). Disregard Step 5.

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Seven

E-Series Rotary and

Linear Operations

Series 35 thru 70 Spring Return (DSR) Models Only

The single acting cylinder opposite the spring cylinder does not require cylinder plate (12). Disregard Step 5

for this cylinder.

Series 85 thru 185 and 127 thru 187 Only

5A) Install washers (12b) and mounting bolts (12a) to fasten cylinder plate (12) to drive case (2).

Models 125S thru 185S Only

5B) Install drive rod cover (37) and mounting screws (38).

Model 70D3 and 70D3SR Only

These models include an additional cylinder on one side of the operator. Perform Step 6, using drive rod

extension (35) to replace lock nut (18). Perform Step 7. Perform Step 8, using the longer of the two short

cylinders on Model 70D3SR. Repeat Step 5, using center cylinder plate (36). Repeat Step 6 and 8.

6) Install piston seal (17) and piston center O-ring (16) on piston (15). Install piston on drive rod end. Install

lock nut or capscrew (18).

Spring Return (SR) Models Only

Install spring cartridge as shown in Fig. No. 1 and Fig. No. 2. If possible, place operator with drive rod verti-

cal, and install spring cartridge assembly before replacing spring cylinder. If not, position the drive rod so it

extends as far as possible into the spring cylinder and stall spring cartridge assembly. Be careful at all times

not to score cylinder bore.

7) Install stay rods (21).

8) Slide cylinder (20) over piston (15) into cylinder plate groove.

9) Install cylinder gasket (19) on end cap (22), (except for spring cylinders) and install end cap. Ensure that

the cylinder is seated in the end cap and cylinder plate groove. Install lock washers (23) and nuts (24),

tightening evenly across the end cap to prevent damage to the cylinder and to ensure a tight seal on the

gaskets.

10) Install O-ring (26), washer (27) and jam nut (28) on end stop (25). Thread end stop into end cap to adjust

travel and tighten jam nut.

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Eight

E-Series Rotary and

Linear Operations

VII LINEAR OPERATIONS

Bettis “E-Series” Gate Valve Operations (GVO) use pneumatic (GVO-LP) or hydraulic (GVO-HP) double act-

ing cylinders to provide thrust on the valve stem. Refer to page 15.

Disassembly

1) Make sure no pressure is being applied, then disconnect all piping to the operator. To replace O-rings

and gaskets without demounting operator, proceed as follows:

2) Remove end stop (20), washer (18) and O-ring (17).

3) Remove stay rod nuts (16), lockwashers (15), end cap (14) and gasket or O-ring (11).

4) Remove sufficient stay rods (13) to allow removal of cylinder and piston.

5) Remove cylinder (12).

6) Remove lock nut (9), piston (8), piston seal (10) and piston center O-ring (7).

7) Remove cylinder plate (5), gasket or O-ring (11), drive rod guide (3) and drive rod seal (4).

Assembly

1) Inspect and clean parts. See page 6.

2) Install drive rod seal (4), drive rod guide (3) and gasket or O-ring (11) in cylinder plate (5). Install cylinder

plate and align port to match existing tubing.

3) Install piston center O-ring (7) and piston seal (10) in piston (8). Install piston (8) and lock nut (9) on

drive rod (6).

4) Install cylinder (12) over piston (8) and ensure the cylinder end is seated properly on cylinder plate (5).

5) Install stay rods (13).

6) Install O-ring or gasket (11) on end cap (14). Install end cap and ensure cylinder end is properly seated.

7) Install O-ring (17), washer (18), jam nut (19) and end stop (20).

Travel Stop Adjustment

The stem connector (1) stops against the mounting plate (2) at bottom of stroke. It is adjustable on the valve

stem and locked with a setscrew. The top of stroke end stop (20) is adjusted and then locked with jam nut

(19).

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Nine

E-Series Rotary and

Linear Operations

VIII TESTING AND TROUBLESHOOTING

1) Check accessories to ensure adequate pressure and flow of air to cylinders.

2) If a mechanical override device (handwheel or hydraulic handpump) is present, ensure that it is disen-

gaged to allow movement of the operator.

3) With pressure applied to the operator, check gaskets and end stops with soapy water or another leak

detecting fluid. A leak indicates that nuts must be tightened or gaskets/O-rings replaced.

4) With pressure applied to the operator, check for leakage (blow-by) from the opposite side of the piston. A

leak indicates that O-rings must be replaced.

5) If the operator has not been operated for a long period of time, some leakage past piston seals may be

observed upon start-up. Operating the operator a few times should cause the O-rings to regain their

resiliency and stop this leakage.

Operation and Service Manual

Document No. I-0004 Rev. 6: 1996-06-06

March 27, 2003 - Page Ten

E-Series Rotary and

Linear Operations

IX SPECIFICATIONS

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