DESCRIPTION
Teadit Metalflex® 913 Spiral-wound gaskets are made of a preformed metallic strip and a soft filler material  wound together under pressure, with an outer guide ring.

CONSTRUCTION
Style 913 is constructed with a metallic guide ring, metallic winding and a filler element. The winding is manufactured from metal in a complicated form of a spiral, in assembly with a filler material. The filler materials fill the irregularities of the flanges. Its external guide ring has the function of centering the gasket in the flanges and gives the sealing elements additional resistance to the flow pressure and excessive bolt torque.

APPLICATION / SERVICE
For applications with high temperature variations (thermal cycling), and/or pressure variations, and/or flange rotation problems etc., gaskets with adequate residual stress (stress retention) and flexibility are needed. TEADIT spiral-wound gaskets have been designed to meet these demanding requirements.

MATERIAL PROPERTIES
Filler Material	Max. Temperature
Mica Graphite	232°C (450 °F)
Flexible Graphite	450°C (842 °F)
PTFE	260°C (500 °F)
Pressures available from 150 to 2500 class as specified.

Teadit Metalflex® 913-M

DESCRIPTION Teadit Metalflex® 913M is a 913 with an internal solid ring that fills the space between the flanges. Gaskets with PTFE and flexible graphite filler have a tendency to inward buckle thus the use of an inner ring is recommended. ASME B16.20 requires the use of the inner ring with PTFE fillers and some sizes with all other fillers. It requires inner rings for all flexible graphite filled unless the purchaser specifies otherwise. Inner rings also avoid turbulence in the flow of the fluid or help provide protection against corrosion or erosion. 

CONSTRUCTION, APPLICATION/SERVICE, MATERIAL PROPERTIES
See Teadit Metalflex® 913

The Spiral Wound Teadit Metalflex® 913-M for flanges ASME B16.5 follows rigorously the specifications from ASME B16.20. For some special applications, PTFE inner rings or composite grooved metal/expanded PTFE type can be offered such as Teadit 913-CMP with an ePTFE/Monel Camprofile Inner Ring for HF service.

Teadit Metalflex® 913-RJ/913M-RJ

The 913-RJ is a specially sized spiral wound, designed to be a replacement item in ring joint flanges for maintenance purposes, when ring joint gaskets may no longer be practical. They are not for original designs. The outer ring bridges the ring groove, placing the winding (and inner ring if style 913M-RJ) between the groove ID and the flange bore. Teadit provides "typical" dimensions for these items. However the user must assure that the winding (and inner ring if applicable) does not protrude into the flange bore, which may vary. Proper movement is needed in the piping to compress the spiral wound. Please contact Teadit's Technical Department for assistance.

DESCRIPTION
Teadit Metalflex® 911 Spiral-wound gaskets are made of a preformed metallic strip and a soft filler material (PTFE or graphite), wound together under pressure. The metal strip holds the filler, resulting in excellent mechanical resistance, resilience and recovery.

CONSTRUCTION
This spiral wound is constructed with a metallic winding and a filler element. The winding is manufactured from metal in a complicated form of a spiral, in assembly with a filler material. The metallic Winding, of special profile, provides excellent resistance, compensating the changes in operational conditions such as: variations of pressure and temperature, vibrations, thermal shocks, etc. The filler materials fill the irregularities of the flanges.

APPLICATION / SERVICE
For applications with high temperature variations (thermal cycling), and/or pressure variations, and/or flange rotation problems etc., gaskets with adequate residual stress (stress retention), flexibility and recovery are needed. TEADIT spiral-wound gaskets have been designed to meet these demanding requirements. The flanges should be designed to provide compression limitation to the gasket's optimum compressed thickness (Please contact Teadit Technical Department for details).

MATERIAL PROPERTIES
Filler Material	Max. Temperature
Mica Graphite	232°C (450 °F)
Flexible Graphite	450°C (842 °F)
PTFE	260°C (500 °F)
General Note:  Pressure Construction may be specified from 150 to 2500 class.

Teadit Metalflex® 911-M   DESCRIPTION Developed basically for the same application as the Metalflex® 911, but specifically for elevated vacuum, pressures and temperatures, this Metalflex® 911-M is a modified 911 with an internal ring that fills the space between the flanges, avoiding turbulence in the flow of the fluid or as a protection against corrosion or erosion. It is also used as a compression limit.  Second, gaskets with PTFE and flexible graphite filler have a tendency to inward buckle thus the use of an inner ring is recommended. CONSTRUCTION, APPLICATION/SERVICE, MATERIAL PROPERTIES See Teadit Metalflex®911 Teadit Metalflex® 911-T  DESCRIPTION Double Jacketed bars are welded into the winding of a Metalflex® 911 developed for shell and tube heat exchangers with several passes.The bars are manufactured in the same material and are plasma or spot welded to the winding. When used in a properly designed groove, Metalflex® 911-T generally provide good sealability. In many other cases the addition of solid metal inner and outer rings (913MT) are recommended. CONSTRUCTION, APPLICATION/SERVICE, MATERIAL PROPERTIES See Teadit Metalflex®911 Teadit Metalflex® 914   DESCRIPTION Style Metalflex® 914 spiral wound gaskets are windings in non-circular forms like oval, rectangular and square with rounded corners, diamond, oblong or pear shaped. CONSTRUCTION, MATERIAL PROPERTIES See Teadit Metalflex®911 APPLICATION/SERVICE Teadit Metalflex® 914 spiral wound gaskets are used in boiler handholes and manholes, equipment, engine head-gaskets and exhaust systems.

Note: The addition of solid metal inner rings is recommended for some applications to avoid crushing or pinching on the gasket ID.