1. COURSE DESCRIPTION

This training will provide the student with the skills and knowledge required to test, disassemble, clean, inspect, retest, and mount a pallet actuator by instructions and habits of pallets safe work. NOTE: To properly repair the pallet actuator, course plans RV09701, TK09702, NEA09703 and

PBO09706 must be taught sequentially.

At the end of this training, the student will be able to: Identify the components of a pallet actuator.

Describe the function of a component.

Describe the flow path of a pallet actuator.

Explain the sequences of how the pallets work.

Explain how it works.

Describe how to adjust the actuator's ends.

At the end of the lesson, the student will be evaluated on this module through an exam summary (ES) and a summary laboratory (LS), for which a summary note 70% must be obtained for each exam.

1.1. EVALUATION METHODS

A question on the RV09701 lesson (revision objectives), the 70% success with correct answers Laboratory exercise of the RV09701 lesson, 70% success criterion correct answers.

Disassembly and assembly of pallets using

Work. Testing and operating the actuator with a minimum of Leaks.

1.2. TRAINING CONTENT:

Training book Pallet actuator installation and troubleshooting manual Actuator specifications and dimensions data

RV series pallet valve actuator

1.3. INSTRUCTOR'S COURSE MATERIAL

Polyscope of course plan (RV09701)

Transparent

Models (pallets and tanks)

Video - pallets2. Introduction

2.1. Shafer actuators are present in various locations around the world

Whole. Here are some of the features:

Natural gas pipelines

Gasoline Pipeline

Oil Pipelines

Oil drilling rigs, on land and at sea

Wastewater treatment plants

Freshwater plants

Underwater applications

N.A.S.A. engine testing platforms

2.2. Pallet actuators are very reliable and work with minimal annual maintenance. Their unique design consists of the only piece in motion. The pallet actuator is the most simple of all actuators available on the market today. The history of its design dates back to the 1940s.

2.3. The reasons for troubleshooting pallet actuators may vary:

To remove condensation from gas/hydraulic tanks and to check the oil level.

To check the actuator's internal joints

To clean the control filter

To change used washers (oil leaks)

To check the correct operation

To recommend an update of the control system

2.4. Applications of the pallet actuator: Quarter-turn valves - ball, butterfly, and cork.

3. PALLET ACTUATOR

3.1. The operating sequences of the pallet actuator system. (Figures do not accurately represent reservoir levels)

SEQUENCE 1

The actuator can be powered by a distributor hydraulic gas, a gas stored under pressure, or by the natural gas pressure from a pipeline. In this figure, the actuator is equipped with tanks hydraulic gas and is powered by the pressure of Gas. The actuator is in the open position,in the first sequence. There is no pressure in the actuator or reservoirs

SEQUENCE 2

The actuator's control system is used to make enter high-pressure gas into the tank hydraulic gas-closing gas. Gas under pressure in the tank forces the hydraulic fluid into the actuator's closing hole. Passages pressure balancing allow both closing quadrants to be simultaneously under pressure, providing a balanced torque while pallets are pushed back from stationary skates. The actuator rotates clockwise.

SEQUENCE 3

When the actuator reaches the position completely closed, the control system leaves all the remaining pressure in the tank to drain towards externally, thus neutralizing the pressure in the tank and in the actuator.

3.2. Identify the components of a NEW pallet actuator and describe its function.


3.2.1 CULASSE SUPÉRIEURE - carbon steel.  


A. round breech with a mirrored finish


B. Four drain plugs are provided on the upper breech. Two of them are used to purify the air in the actuator, and the other two serve as an entry and return hole. These holes are located on the top or side of the upper breech, depending on the size of the actuator.


C. The bronze rings for the low friction bearing surface are equipped with internal joints. This facilitates the alignment of the rotor. (Bronze rings are replaceable).


D. Drill for the installation of lifting rings.


E. Equipped with other holes drilled and tapped for the assembly of the end-of-race switch, electrovane, and end-of-race valve.


F. On large actuators, you'll notice holes with the grinded surface for the washer anchor bolts.


G. Balancing passages in the upper breech to allow a balanced torque on both pallets.


Note: Some models have a passage in the upper breech and a passage in the lower breech.


3.2.2. CULASSE SUBSE - carbon steel.  


Has. Drain plugs are used to drain oil and condensation from the actuator.


B. Bronze ring for a low-friction bearing surface


equipped with internal joints. This makes it easier to align the rotor. (Bronze rings are replaceable).


C. On large actuators, you'll notice holes with a grinded surface for the washer anchor bolts.


D. Drill to match the support strap of a specific valve.


3.2.3. CORPS OF THE ACTIONER - carbon steel.  


A. Cylindrical body with mirrored interior


B. The upper and lower parts of the body are pierced and tapped to mount the upper and lower breech with the washer.


C. The body has holes drilled for the anchor bolts with a flat surface grinded for the puck.


D. The body has holes drilled and tapped for adjustable puck-set ends.


3.3. Identify the components of a FORMER pallet actuator and describe its function.


3.3.1. CULASSE SUPÉRIEURE - The old upper breech style has the same characteristics, with the following exceptions:


Has. Some balancing passages are in the crossbar. This block is above the rotor.

B. Rather than a ring in the breech, lubricant injection holes are used to seal the rotor.

 3.2. Identify the components of a NEW pallet actuator and describe its function.

3.2.1 CULASSE SUPÉRIEURE - carbon steel.  

A. round breech with a mirrored finish

B. Four drain plugs are provided on the breach Upper. Two of them are used to purify the air in the actuator, and the other two serve as an entry and Back. These holes are on top or the side of the upper breach, depending on the size of the actuator.

C. Bronze rings for low bearing surface friction are equipped with internal joints. This makes it the easier alignment of the rotor. (The bronze rings are replaceable).

D. Drill for the installation of lifting rings.

E. Equipped with other holes drilled and tapped for the assembly of the end-of-race switch, electrovane, and valve end of the race.

F. On large actuators, you'll notice holes in

drilling with a grinded surface for anchor bolts with the puck.

G. Balancing passages in the upper breech to

allow a balanced torque on both pallets.

Note: Some models have a passage in the breach upper and a passage into the lower breech.

3.2.2. CULASSE SUBSE - carbon steel.  

Has. Drain plugs are used to drain oil and condensation of the actuator.

B. Bronze ring for low-friction bearing surface equipped with internal joints. This makes it easier to align the rotor. (Bronze rings are replaceable).

C. On large actuators, you'll notice holes in drilling with the grinded surface for anchor bolts with the puck.

D. Drill to match the support strap of a valve Specific.

3.2.3. CORPS OF THE ACTIONER - carbon steel.  

A. Cylindrical body with mirrored interior

B. The upper and lower parts of the body are pierced and tapped to mount the upper and lower breech with the puck.

C. The body has holes drilled for the bolts anchor with a flat surface grinded for the puck.

D. The body has holes drilled and tapped for adjustable ends with the puck.

3.3. Identify the components of a FORMER pallet actuator and describe its function.

3.3.1. CULASSE SUPÉRIEURE - The old upper breech style has the same characteristics, with the exceptions Following:

Has. Some balancing passages are in the Crosses. This block is above the rotor.

B. Rather than a ring in the breech, injection holes lubricants are used to ensure the rotor is watertight.

3.3.2 CORPS AND CULASSE SUBSE- cast iron.

Has. The body and lower breech of the style actuator are made of cast iron and cast in one piece.

B. The upper part of the body is pierced and tapped to mount the breach on the body with the washer.

C. The body has drilling holes with a grinded surface for the anchor bolts with a washer.

D. The body is pierced with two holes tapped for the holes entry and return.

E. The lower part of the body (lower breech) is pierced and tarauded to mount the actuator on the valve.

F. The lower part of the body (lower breech) has drilling holes with grinded surface for bolts anchor with the washer.

G. Rather than a ring in the breech, injection holes lubricants is used to ensure the rotor is watertight.

3.4. Actuator sizing - Internal body diameter x internal diameter of the length - the size of the actuator.

3.5. PATIN - cast iron.  

A. Makes it easier to align the rotor.

B. The case is divided into two parts.

C. Provides a surface to absorb the end-of-race torque of the Stops.

D. The skate joint surrounds it.

3.6. BUTES  

3.6.1 Adjustable stops adjust the rotor's course.

NOTE: The normal rotor run is 90 degrees. The targets may increase or reduce the rotor's run by 2 2 degrees in each direction.

- The maximum run is 95 degrees

- The minimum run is 85 degrees

3.6.2. Quadruple bar - Adjustable stop, currently in use

Has. How to differentiate between opening and closing ends: Stand on the pipeline, facing the skate bolts actuator. Find the stop setting. The setting on the right side corresponds to the closing stop and the one on the left side represents the opening stop. Do the same thing on the other side of the actuator.

B. Vannes equipped with mechanical stop.

WARNING: If the valve is equipped with its mechanical stops, those of the actuator must be adjusted so that the torque is applied to them, and not at the valve's ends. This correct setting will allow eliminating excessive tightening of the valve rod and possible damage.

1. Set all the actuator's ends to a maximum run. Loosen the locking collar of a quarter-turn and hold it in place. Turn the stop setting square clockwise until the stop bar is located against the body. Tighten the locking collar

2. Pump manually to FERMER the actuator and the valve against mechanical stops.

3. Loosen the locking collar of a quarter-turn and hold it in place.

4. Turn the stop setting square on the closure until they are stalled (on contact) against the actuator's pallets.

5. Tighten the locking collar.

6. Pump manually to OPEN the actuator and valve and make the stop open. Repeat Steps 3.6.2, 3.6.3, 3.6.4, and 3.6.5.

7. Turn the stop setting square into the clockwise to increase the race of Pallets.

8. Turn the stop setting square in the direction anti-clockwise to reduce pallet stroke.

Internal stops - stop bolt. Has. This type of stop consists of a bolt screwed into the skate and can only be set by removing the upper breech.

B. Turn the bolt clockwise to increase the pallet racing.

C. Turn the bolt counterclockwise to reduce the pallet racing.

3.7. Rotor and pallet - carbon steel.  

Has. The rotor and pallet are the only moving part with 90 degrees.

B. The rotors were machined until 1994 specific information from the valve rod. They were for a specific valve rod with four Grooves.

C. Today, the rotors are silly to fit into an adapter, to provide a wide range of uses with two grooves.

D. The bronze treads are on the tips of the Pallets. Bronze will wear first, rather than the palette and The breech.

E. The size of the pallet is determined by the strength of the torque necessary to operate the valve.

F. The pallet has a joint on three sides and the fourth is welded to the rotor.