User Guide

ES1325 Rev. A
3
Installation Instructions
This quality Conbraco safety valve, along with proper installation, use and maintenance will provide many years
of reliable service and protection against excessive pressure build-up of water and steam. Use of this valve for
any other purpose or media places all responsibility upon the user. Before installing valve, or operating
equipment to which it is installed, read all instructions carefully.
Caution - Always wear proper safety equipment.
Caution – Valve may be very hot to the touch. Wear protective equipment if necessary.
1. Installation must be performed by qualified service personnel only.
2. It is the piping system designer’s responsibility to implement appropriate protective measures to minimize reaction
forces and moments which result from supports, attachments, piping, etc.
3. Service is to be compatible with the materials of construction. Prior to selection it is the user’s responsibility to
determine that the valve is appropriate for the intended application. Application not to allow corrosion >.001”/year (.025
mm/year).
4. The capacity rating of this valve must equal or exceed that of the equipment to which it is installed.
5. Do not use this valve on a coal or wood fired boiler having an uncontrolled heat input.
6. Do not use the test lever as a lifting device during installation.
7. Insure that all connections, including the valve inlet, are clean and free of any foreign material.
8. Use pipe compound sparingly or tape on external threads only.
9. Do not use a pipe wrench! Use proper type and size wrench on wrench pads only.
10. This valve must be mounted in a vertical upright position directly to a clean tapped opening in the top of the pressure
vessel. Under no circumstances should there be a flow restriction or valve of any type between the safety valve and
pressure vessel.
11. See ASME Boiler and Pressure Vessel Code and local jurisdiction for additional installation and operating instructions.
Caution - During operation, this valve may discharge large amounts of hot, high pressure steam or water.
To reduce the potential for bodily injury and property damage, a discharge line must be installed that:
a) is connected from the valve outlet to a safe point of discharge with no intervening valve;
b) allows complete drainage of the valve and discharge line;
c) is independently supported and securely anchored to avoid applied stress on the valve;
d) is as short and straight as possible;
e) terminates freely to atmosphere where any discharge will be clearly visible and is at no risk of freezing;
f) teminates with a plain end that is not threaded;
g) is, over it’s entire length, of a pipe size equal to or greater than the valve outlet. Use only schedule 40 pipe for
discharge. Do not use schedule 80, extra strong or double strong pipe or connections. Do not cap, plug or obstruct
discharge pipe outlet! If discharge is piped upward, a condensate drain must be provided in the elbow below the
vertical pipe to prevent condensate from returning into the valve. A Conbraco Drip Pan Elbow is ideal.
Operating Instructions
If adding water to a boiler, do not allow water to flow through safety valve as sediment or debris may be deposited on seating surfaces.
To achieve topmost performance and maximum service life, it is necessary to maintain a proper pressure margin between
the set pressure of the safety valve and the operating pressure of the equipment. The minimum recommended operating
pressure margin for this type of safety valve is 10 psi or 25% of set pressure, whichever is greater. Failure to maintain this
operating margin may result in leakage past the seat and an accumulation of deposits on the seating surface. Excessive
deposits may prevent the safety valve from operating properly, and a dangerous pressure build-up and equipment rupture
may result.