Overview

Read these instructions carefully before starting the valve installation.

Keep the instructions in the proximity of the valve for easy access by the valve operators.
EEP takes no responsibility for any damage caused by the valve’s incorrect transportation, handling, installation or use.
The non-leakage warranty exclusively applies to the valves that are provided with a manual gear or an actuator installed at the manufacturer’s factory, provided that the manual gear or actuator in question has not been removed or adjusted by the user.

Marking

The valve’s identification shield is attached to the actuator attachment flange in the valve frame.

The shut- off seal is located on the opposite side of the frame, seen from the identification shield.

The marking groove on the shaft end indicates the valve disc position. The valve closes clockwise and opens counterclockwise, by turning 90 degrees in both directions.

Receiving, storage and transportation

During the initial inspection, check that the valve and its accessories are free from any damage.

During storage, the valve must be protected against sand, dust and any other impurities. Avoid long-term storage of the valve outdoors exposed to the effects of rain, sunlight or frost.

When hoisting the valve, always use lifting straps threaded through the lifting lugs and around the valve’s upper neck.

Hoisting the valve with the lifting straps threaded around the actuator is forbidden.

Use special caution when hoisting, transporting and installing the valve.

The actuator’s centre of gravity may deviate from the valve centre line.

This may tilt the valve and actuator during lifting. Even minor impacts may damage the actuator or change the actuator’s or valve’s adjustments.

Installation.

Check the type of neck-welded flange in Production Card

Make sure that mounting gaskets totally cover contact surfaces.

During installation make sure that flanges and gaskets are coaxial and parallel to each other.

The disk must be in close position during installation.

Check the clearness inside the valve before installation.

The installation order

Fig.1. Preassemble the unit of the valve, mounting gaskets and flanges. Connect it by few fasteners and slightly tighten.

Fig.2. Tack weld preassembled unit to the pipeline.

Fig.3. Remove the valve and mounting gaskets from pipeline and make all weld around flanges.

Fig.4. Clean the pipework carefully before installing the valve. Any welding debris and other impurities remaining inside the pipework may damage the valve’s shut-off surfaces at a later stage. In this connection, it is also advisable to check that the valve is free from any impurities induced by transportation and storage. During installation make sure that the valve will not be under excess load.

It is Important that the valve and gasket are central the flanges and the flanges are parallel.

Otherwise there will be the risk of leakage through holes in counter flange.

The direction of the flow pressure must be taken in account. The directional arrow is located on the valve’s flange.

The most recommendable installation position for a butterfly valve is with the valve shaft in a horizontal position. Do not install the valve close to a pump or a curved pipe section, due to the turbulent flow that they cause. The flow must be laminar at the valve.

The pipes must be provided with appropriate support. An inadequately supported section of pipework will cause excessive stress on the valve, possibly resulting in leakage from the shut-off surfaces.

Pipework temperature variations will cause thermal contractions and expansions which must be allowed to occur freely, with the aid of bellow-type compensators, for example. Without these, or other similar solutions, pipework expansions will excessively burden the joints.

Do not install the valve into the lowest and highest parts of pipeline.

Fill the pipework via the by-pass valves. Install a by-pass valve in order to avoid pressure impacts and to reduce the forces that are caused by opening the butterfly valve under pressure.

The valve disc must not be the final item that separates the content of the pressure vessel (tank and pipework) from the environment. However, in cases where this cannot be avoided, secure non-leakage by other means, by welding a solid flange to cover the valve’s open end, for example.

Flush the pipework thoroughly once the valve installation has been completed.

All valves delivered to the Customer passed the hydro test at the factory; however, it is necessary to check that there are no faults due to transportation and handling.

If the valve is used for control application then make sure that there is no cavitation mode. Prolonged operation of valve in cavitation mode can lead to erosion valve's parts and destroy it.

It is not recommended to use the first and the last 10% of total stroke of the disk in regulate applications.

If the disk was open at small angle (5^o - 15^o) for prolonged time then open the disk to wider angle (25^o-30^o). before closing. Thereby the seat area will be flushed up and cleaned. The movable debris from pipeline might stack between valve’s body and disk, opened at small angle.

Make sure that the valve-actuator combination functions without problems prior to the start-up procedure.

Always close the valve using the actuator’s mechanical travel stops; stay below the maximum torque limit. Avoid the use of excessive force in closing as this cannot improve the valve’s tightness.

Valve opens by turning the hand wheel clockwise.

A valve provided with an actuator must always be opened pneumatically with the travel limit serving as the closing limit.In an emergency, you may open and close the valve by turning the electric actuator hand wheel.

In these cases, however, observe that the hand wheel’s closing limit has been set to turn the valve disc 2-3 hand wheel revolutions beyond the optimal closed position. This means that the optimal tightness is achieved by turning the hand wheel 2-3 revolutions in the opening direction, starting from the gear’s mechanical closing limit.

Maintenance

EEP valves are durable and dependable. An appropriately selected and carefully installed valve will not require maintenance during its life cycle.

Leakage from the valve’s shut-off surfaces is often caused by wear and tear, pipework impurities or damage resulting from pressure impacts. Impurities can be removed by opening the valve and allowing the flow to flush the shut-off surfaces clean.

Probability of hydro-stress can be excluded by using by-pass valves. The scope of maintenance and repair work consists of

• Cleaning of internal surfaces
• Replacement of main gasket
• Tightening or replacement of stem sealing. This work is possible to carry out when the valve is on- line if the pipeline is not under pressure. For the rest of the repair works, the valve must be taken away from the line.

Manual gear removal and installation

Avoid removing the manual gear from the valve. The manual gear adjustments have been made at the factory so as to secure the valve’s tightness. Removing the manual gear requires that the adjustment sequence be repeated.

REMOVING THE MANUAL GEAR IS PROHIBITED WHILE THE VALVE IS UNDER PRESSURE

Removal:

• Turn disk to position “close”.
• Mark the manual gear in relation to the valve.
• Turn out bolts between actuator and valve, take out actuator.
• Remove wedges.

Installation:

• Install the manual gear with the valve in closed position. Make sure that the manual gear is in the closed position as well.
• Place wedges.
• Install the manual gear in original position. Attach the manual gear to the valve with bolts. Tighten the bolts evenly in a crosswise sequence. Apply locking agent to the bolts.

Manual gear adjustment

• Open the manual gear travel limit locking bolts 2 and 4, and open adjustment screws 1 and 3
• Turn valve into closed position, so that the disk is parallel to the seal. Right position checked by measuring the distance X from flange of the valve to the disk surface. (Fig. 6). The distance must be equal on both sides of the disk.
• Adjust stopper of “Close” position in manual gear. Turn adjustment screw 1 gently until its movement stops. Tighten locking nut 2.
• Turn the disk to 0 degrees until completely in Open position.

Adjust stopper of Open position in manual gear. Turn adjustment screw 3 gently until its movement stops. Tighten locking nut 4.

The approximate position of the disk can be defined by marking groove on the end of shaft. (Fig. 7). The disk is parallel to the marking groove.

Note changing the factory settings of the gearbox will void the factory warranty for the valve.

The valve in MF version can be equipped by manual hand wheel or multiturn motorized actuator at customer site or at factory in accordance to customer demands.

Check the maximum operation torque for this MF valve and do not exceed that value in no circumstances. Always check in the operation torque for specific valve and gear combination.

• Close the disk by hand wheel.
• Replace the wheel by multiturn motorized actuator.
• Set the torque limits to value given by valve’s producer. Connect wires and make sure that torque limit switches activated.
• Set position of the disk as position close.
• Make test run of actuator and make sure travel limits stop the disk just before torque limit. Adjust limit switch if necessary. Correctly adjusted limit switch must activate in advance to torque switch.
• Repeat steps 4-5 for open position.

Dismantle and installation of actuator

Avoid dismantle of the actuator from valve. The adjustment of the actuator has been made at the factory to secure the valves tightens. Dismantling the actuator requires repeated adjustment.

Dismantling the actuator is prohibited while the valve is under pressure or could be under pressure.

Dismantle:

• Turn the valve to the closed position.
• Switch off voltage supply to the actuator.
• Loosen the actuator attachment bolts and pull actuator out.
• It is necessary to remove the actuator clutch piece, for example, in connection with shaft seal replacement.
• Mark the clutch piece height on the shaft.
• Loosen the locking screw, and pull the clutch piece off the shaft.
• Remove the wedges.

Installation:

• During installation, the valve must be in closed position. Make sure that the actuator itself is in closed position as well.
• Place the wedges. Attach and lock the actuator clutch piece on the valve shaft at its original height.
• Install the actuator to the valve. Attach the actuator to the valve by bolts. Tighten the bolts evenly in a crosswise sequence. Apply a locking agent to the threads.
• For additional instructions, see the manual supplied with the actuator.