Finite Element predictions are validated by conducting actual non-destructiveand performance test on is this integrated Finite Element Aided-desing and Testing Approach that that FIP are most yet one of the most economical available for the applications. STRESS CONTOURS
GATE
ELEMENT
AND
AND BY COMPUTER-AIDED-DESIGN APPROACH optimizing the designs, detailed parametric studies involving many parameters are conducted on the components of the These studies helped us develop optimum configurations for many different applications. The results of these Finite Element Analysis and Parametric Studies are incorporated in a Computer Program that produces the complete design infomation for a of any pressure rating most
ELEMENT MESH USED STUDIES
Finite Element predictions are validated by conducting actual and performance test on this integrated Finite Element Analysis, ComputerAided-desing and Testing Approach that that FIP are most yet one of the most economical available for the applications. STRESS
GATE
BLOCK AND BLEED SEAT
GATE
OPEN
As in Fig. 1, When the Sure-Seal is open, the bores of the body, seats and gate line up to present an unobstructed flow passage. The "O-Rings on the back faces of seat act as to maintain seat-to-gate sealing contact and aided by the seat inserts, the body pressure may bled to zero.
FIG. 1
GATE
CLOSED POSITION
is closed, Fig. 2, complete shutoff is pressure acts against the upstream of the gate, displacing it against the downstream which stops against the of the seat pocket in the body. Pressure upstream acts on the back face of the upstream seat, forcing it against the gate. Thus, body pressure may be bled, if When the
DOWNSTREAM
The is metal-to-metal once the insert is compressed by upstream line pressure acting on the gate moving it against the downstream The teflon seat inserts the important functions of assisting a at low pressure, reducing function drag, and acting as a dam for lubricant on the downstream seat face for auxiliary if ever required.
FIG.
2
SECONDARY
SYSTEM SEAT
SYSTEM
A secondary sealant injection system is provided, in case damage to the measure available until the can be repaired.
Sealant fittings are strategically located to
Back up check prevent line pressure fom line pressure from reaching atmosphere when sealant fittings are removed. This when are piped for buried
area should accur. This is a temporal
complete coverage of the secondary sealant.
PL
When necessary, it is possible to inject plastic sealant while the is under pressure. CHEVRON PACKING
