Consolidated Type 13900 Series Pilot-Operated Safety Relief Valve0 pages

GE Oil & Gas

Consolidated*
13900 Series
Pilot-Operated Safety Relief Valve
Overview
The Consolidated 13900 series pilot-operated safety relief valve
from GE is designed specifically for high capacity steam applications
and contributes to the overall efficiency and profitability of plant
operations.

Features and Benefits
For system applications that require large discharge releasing capacities,
GE’s 13900 valve series provides very reliable working economy and
a simple, efficient valve design. In addition, its valve configuration
simplifies valve installation and in-line valve maintenance.

Greater Total System Efficiency
t main valve can handle extremely large relieving capacities, in
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excess of 3 million pounds of steam per hour (1,360,777 kg/hr). It has a
seven-to-one discharge capacity over a “T” type orifice, and a two-toone discharge capacity over a “W” type orifice.

Improved Design
t total valve external configuration is considerably smaller in size,
The
and the valve is lighter in weight than a comparable spring-loaded
valve. Because of these features, less space is required for valve
installation.
t simple, efficient, and reliable direct acting valve design with few
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components eliminates the need for excessive spare parts inventory
and reduces maintenance time.

Easy Installation and Maintenance
Valve configuration is considerably smaller in size and lighter in weight
than a comparable spring-loaded valve. This simplifies installation, field
handling, testing, and valve maintenance.
Valve maintenance is relatively simple and straightforward. The simple
valve design means fewer parts, so less can go wrong, malfunctions can
be readily diagnosed, and maintenance cost and process downtime can
be very limited.
To simplify valve maintenance, all main valve components are removable
through the top bonnet of the valve. The pilot valve can be field tested
and repaired without breaking inlet and outlet piping connections on
the main valve. The pilot valve opening and closing is easily adjusted on a
small test facility.

Description
The 13900 series pilot-operated safety valve is an ASME Section
VIII-approved valve intended for use on compressible fluids. The valve
design is simple. It consists of a small, conventional, fail-safe pilot
safety valve and main valve.
The metal-to-metal contact bearing surfaces between the disc and
bushing eliminate overcompression of the main valve seat O-ring,
located between the disc and bushing. By removing the pressure
from behind the O-ring via two small slots when the valve is open and
flowing, O-ring seal blowout is eliminated. A condensate drain hole in
the disc facilitates drainage of any accumulated moisture in the upper
disc cavity.
The spring-loaded U-shaped Teflon® guide seal provides increased
seat tightness as system pressure increases.
The Teflon© material greatly lessens friction on the main disc and
allows for reliable, dependable, and repeatable disc action. The seal
spring load ensures sealing at all times.
Teflon® guide rings eliminate metal-to-metal contact between
the disc and guide, and eliminate friction. Main valve disc action is
repeatable and reliable.
The pilot valve action directly controls the pressure forces on the
main valve disc and eliminates the need for a transfer valve. System
pressure that actuates the pilot valve is transmitted through a simple,
full-flow-design sensing tube. The sensing tube eliminates small
orifice control parts and their possible clogging characteristics and is
enclosed within the valve body, which protects it from damage and
freezing.
Pilot valve blowdown adjustment can be set independently of the
main valve. The pilot valve can be adjusted and set before it is installed
on the main valve.

fact sheet