ESD valves are used to isolate the facilities in emergency situations. An ESD (emergency shutdown) valve is a valve fitted with a spring return actuator, allowing the valve to be closed by the actuator spring when the actuator pressure signal is released.

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The ESD valves should be placed near the pipeline riser on larger plants, with a gap of 15 meters between the ESD valves and the nearest system building.

The idea is to create an ESD “boundary” whereby all piping and vessels on the “facility side” of the ESD valves would be depressured in an emergency situation and the ESD valve is positioned far enough away from possible fire areas to ensure that the valve is not enveloped in the blaze.

To fill the system, open the shutoff valve upstream of the regulator. This valve must always be kept open when the system is in operation. Water will flow into the system until it is full and under pressure. NOTICE Series with Fast Fill and Purge Lever 1/2" valves are equipped with a unique and simple "fast fill and purge lever" which permits rapid filling of the system and sustained flow for air purging. When the lever is raised to the vertical position it pushes a removable "Push Rod" down. This manually forces the valve to a wide open position for maximum flow. Returning the lever to its normal position releases the tension on the rod permitting the valve to maintain normal system pressure. CAUTION Always observe the Boiler Pressure Gauge when using this feature. Using this feature with the Purge Valve closed can result in over-pressurizing the system or exceeding the Pressure Safety Relief Valve set. Over pressurization can result in a water discharge from the Relief Valve. This feature can be disabled to prevent tampering or accidental misuse of the fast fill feature by simply unscrewing the fast fill lever cap and removing the push rod. The regulator is set to deliver water to the boiler at approximately 15 lbs. pressure. This pressure is sufficient for a 3-story building. To reset the reducing valve for higher pressure (when the pressure is not sufficient to lift the water to the highest radiation): A. Calculate the number of feet from the regulator to the top of the highest radiation. B. Multiply this number by 0.43 and add 3 lbs. This will give the pressure required to raise the water to the highest radiator and keep the system under pressure. To reset the regulator valve: Remove the fast fill lever cap, and loosen the lock nut. To raise the reduced pressure - slowly turn the adjusting screw clockwise until the system gauge indicates the pressure required. To lower the reduced pressure - turn the adjusting screw counterclockwise. After completing adjustments, tighten the lock nut and replace the fast-fill lever cap. NOTICE Watts is not responsible for boiler failure on boilers without low water cutoffs. WARNING An annual inspection of all water system safety and control valves is required and necessary. Regular inspection, testing, and cleaning assure maximum life and proper product function. Limited Warranty: Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge. THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product. Some states do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT. IS-1156F 2127 EDP# 1910265 USA: T: (978) 689-6066 F: (978) 975-8350 Watts.com Canada: T: (888) 208-8927  F: (905) 481-2316 · Watts.ca Latin America: T: (52) 55-4122-0138 · Watts.com © 2021 Watts

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An ESDV must act quickly to minimize the effect of a state of dangerous activity. The development of the quarter-turn ball valve offers a swift operation inherently. In addition, with its equal percentage flow characteristic (high gain), it can not only close easily, but can also greatly reduce the amount of process fluid that passes through.

WARNING Read this Manual BEFORE using this equipment. Failure to read and follow all safety and use information can result in death, serious personal injury, property damage, or damage to the equipment. Keep this Manual for future reference.

A pneumatic / hydraulic fail-safe spring-return form is required for a shutdown valve actuator. It was usually not possible to close a shutdown valve (FC). There shall be no use of electrical powered type.

ESD valves are usually quarter turned ball valves, but they can also be sliding stem gate valves or other types, although less common.

It is expected that the shutdown valve will operate promptly even if it exposes to external fire attacks. The shutdown valve body is therefore known as API 607 fire for soft seated valves or API 6FA for API 6A & API 6D valves or BS 6755 Part 2 fire valves.

The Watts Feed Water Pressure Regulator must be installed on the cold water supply line to the boiler. It may be installed in either vertical or horizontal positions. Allow sufficient clearance to operate the fast fill and purge lever. Install a shutoff valve upstream of the regulator. NOTICE Local codes typically require the use of a backflow preventer in the system (Watts Model 9D). Consult local authorities for the type, installation, and testing requirements. The backflow preventer must be installed upstream of the regulator. Prior to installing the regulator, flush out the supply pipe to clear it of chips, scale, dirt, etc. Install the Watts regulator in the supply line to the boiler with the arrow on the valve body pointing in the direction of flow to the boiler.

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For clear positioning and status of a shutdown valve, the shutdown valve shall be fitted with visible external valve location indicators.

Zero / minimum leakage is required as a shutdown valve for a system. The seat leakage check per API 508 and/or ISO 5208 shall generally be passed by a shutdown valve seat leakage.

This function was designed to minimize excessive loss of energy. Reduced ball valve (RB) with hole in the middle will mitigate changes in flow path and turbulence. Practically like a tube, the Full Bore (FB) ball valve significantly minimizes the energy lost.

Shutdown valves (SDV) are widely used to reduce the escalation of hazardous from one system to another in the oil and gas production process for safe and proper isolation purposes. General shutdown valve is controlled by a high integrity Emergency Shutdown System (ESDS).

As a rule of thumb, the shutdown valve should start the shutdown within 10 seconds of activation and the time taken from Full Open to Full Close is within 1-2 seconds per inch of the shutdown valve size.

Based on the tube configuration, if the idealized design can not be accomplished, it may be desirable to clad the exposed pressurized pipe with fireproof insulation to mitigate the risk to this tube in an ESD situation.

IS-1156F Series 1156F, T156B and N256 Feed Water Pressure Regulators Sizes: 1/2" ­ 3/4" WARNING Read this Manual BEFORE using this equipment. Failure to read and follow all safety and use information can result in death, serious personal injury, property damage, or damage to the equipment. Keep this Manual for future reference.

Some shutdown valve may be equipped with accumulator to facilitate valve stroking and /or reopen in the event maloperation.

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NOTICE Watts is not responsible for boiler failure on boilers without low water cutoffs. WARNING An annual inspection of all water system safety and control valves is required and necessary. Regular inspection, testing, and cleaning assure maximum life and proper product function. Limited Warranty: Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge. THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product. Some states do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

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It is essential to know that the valve is capable of providing the necessary level of safety quality and that the valve can work on demand for shutdown valves used in safety instrumented systems.

A shutdown valve should act quickly to reduce risk escalation. In particular, the excellent system in rapid action is a quarter ball valve.

When the valve is in full open position, the ESDV offers limited pressure differential. The full bore ball valve is essentially a tube that reduces the liquid friction of the system.

IS-1156F 2127 EDP# 1910265 USA: T: (978) 689-6066 F: (978) 975-8350 Watts.com Canada: T: (888) 208-8927  F: (905) 481-2316 · Watts.ca Latin America: T: (52) 55-4122-0138 · Watts.com © 2021 Watts

The setpoint pressure was surpassed and the ESDV was completely closed, providing its double-seated model with a bubble-tightened shut-off.

The ESDV comes with an easy-to-read location indicator on the actuator, which helps to ensure that the valve is positioned in the open position.