Junio 240L Lens gaskets are impervious to overpressure. With increasing loads, the contact surface between the spherical lens surface and the spherical flange groove increases, so that the surface pressure only increases to a lesser extent.

A disadvantage with standard sealing lenses is that, at high pressures and temperatures, the sealing lens can bulge along the circumference and weaken the tension of the connection. Also, at greater nominal diameter, the flange can become stuck in the area of the raised face diameter d5 and lift up at the sealing diameter.

• STYLE R Selection Chart

• STYLE R Octagonal Ring Gasket Demensions

Прокладки типа JUNIOSEAL RTJ-R (октагональные) применяются в основном в нефте- и газодобывающей промышленности. Они имеют октагональное сечение и изготавливаются из стали (специальные сплавы согласовываются). Прокладки устанавливаются в специально подготовленных пазах, имеющих форму трапеции, к которым они приспособлены и абсолютно не поддаются выдуванию. Имеют двойную область уплотнения и поэтому обеспечивают высокую надежность даже при очень опасных условиях эксплуатации. При специальном исполнении изготавливаются в виде заглушки, с центрирующим кольцом, с гальваническим покрытием. Стандартные размеры до NPS 36.

Tolerances: (mm)
Width of Ring __________ +0.20,-0.00
Height of Ring __________ +0.20,-0.00
(A plus tolerance of 0.20 mm for width and height is permitted, provided the variation in width or height does not exceed 0.10 mm throughout its entire circumference)
OD of Ring _____________ ±0.51,-0.00
Angle of 23°____________ ±0.5°

Note: Only Rings RX82 through RX91 have a pressure passage hole through the cross section. Center line of hole is located on the mid-point of the width flat.
Hole diameter shall be as follows:
RX82 through RX85_______ 1.52
RX86 and RX87__________ 2.29
Rings RX88 through RX91__ 3.05

• Style RX Selection Chart
  

• STYLE RX-Ring Joint Gasket Dimensions

Прокладка типа JUNIOSEAL RTJ-RX модификация прокладки типа RTJ-R, имеющая более высокие уплотняющие свойства, благодаря тому, что внутреннее давление среды увеличивает контактные напряжения. Прокладки JUNIOSEAL RTJ-RX могут изготавливаться из различных материалов; при специальном исполнении с гальваническим покрытием.

When correctly fitted, the style BX gasket allows virtual surface-to-surface contact of the flange faces, which means that the gasket is fully trapped on both the inner and outer diameters.

All BX gaskets incorporate a pressure balance hole to ensure equalization of pressure that may be trapped in the grooves.

Tolerances: (mm)
Width of Ring ______ +0.20,-0.00
Hole Size _________  ±0.5
Height of Ring _____  +0.20,-0.00
OD of Ring ________ +0.00,-0.15
Angle of 23° ______  ±0 deg 15 min

One pressure passage hole required per ring on centerline. A plus tolerance of 0.20 mm for width of ring and height of ring is permitted, provided the variation in width or height does not exceed 0.10 mm throughout its entire circumference.

NOTE: Radius of the ring shall be 8% to12% of the ring height.

• BX RTJ Sizing Chart
• STYLE BX-Ring Joint Gasket Dimensions

Прокладки JUNIOSEAL RTJ-ВX предназначены для самых высоких классов давления до 20 000 psi. Для них требуются специальные посадочные места. Прокладки имеют двойную область уплотнения; устойчивы к выдуванию. Изготавливаются в стандартных размерах до NPS 30.

The metallic ring joint gaskets are manufactured according to the API 6A and ASME B16.20 standards for application at elevated temperatures and pressures. The small sealing area with high contact pressure results in great reliability. Some types of Junioseal ring-joints are pressure activated, that is, the greater the pressure the better the sealability. Our metal ring joint gaskets have been designed to withstand exceptionally high assembly loads over a small area, thus producing high seating stresses. The Junioseal ring joint gaskets are produced in several shapes and sizes, and are suitable for oil and gas pipeline flanges, pressure vessels, high speed joint faces, and other demanding applications.

Advantages

The metal ring joint gaskets have been designed to withstand exceptionally high assembly loads over a small area, thus producing high seating stresses.

Shape and Construction

The Junioseal ring joint gaskets are produced in several shapes and sizes to meet the most demanding applications.

• R–Oval Type: Standard ring joint gasket with oval cross section and designed to flanges with standard ring joint grooves.
• R–Octagonal: Standard ring joint gasket with octagonal Type cross section and designed for flanges with standard ring joint grooves. Interchangeable with oval section gaskets on modern octagonal grooved flanges.
• RX: An adaptation of the standard R type gasket and designed to fit the same groove design. It is interchangeable with standard R type gaskets
• BX: Specially designed for very high pressures. All BX gaskets incorporate a pressure balance hole to ensure equalization of pressure which may get trapped in the grooves. It is only suited for API BX flanges and grooves.
• Lens Gaskets: Lens gaskets are reusable, as the sealing effect is generally achieved by elastic deformation of the surfaces.

Standard materials Recommended by the ANSI B16.20

Dimensions  STANDARDS for Ring Joint Gaskets Used with Flanges

• Category Download: Junio-240 Ring-Joint Gaskets  

Style R Ring Joint gaskets can be manufactured in accordance with all relevant standards to suit the following flange designations: API- 6A, ASME/ANSI B16.5, MSS SP44 (ASME B 16.47 Series A) & BS 1560.

Tolerances: (MM)
Width of Ring _____________ ±0.20
Height of Ring ____________ ±0.50
Pitch Diameter_____________ ±0.18
(Octagonal) Angle of 23°_____ ±0.5°

• STYLE R Selection Chart 

• STYLE R Ring Gasket Dimensions

The gasket is equipped with various advantages and it can be sealed with low tightening force, can be formed into various shapes according to the shapes of mating face and can be used for high temperature, high pressure and ultra-vacuum services. It is the most suitable gasket for sealing such machinery and equipments that space factor and compactness are accounted much of for their designs. Special surface coating is available according to necessity.

Category Download: Junio-260 Metal O-Rings  

• Basic Type Metal O-Rings
• Balanced Type Metal O-Rings

• JUNIO VP281  V Type, Slit in center from outside
• JUNIO SP281   L Type, cut PTFE into square form
• JUNIO UP281  U Type, Heated & welded at one joint

Category Download: Junio-281 PTFE Envelope Gaskets  

JUNIO 281 PTFE Envelope Gaskets are the ideal solution for applications demanding virtually 100% chemical resistance and where the mechanical properties of a compressed gasket material are also needed. They perform well in the food and process industries where contamination of the medium cannot be permitted, Suitable for medium strong alkalis, cryogenic fluids, oxygen, chlorine gas etc.

• Virtually 100% chemically resistant.
• Temperature range from –200℃ to +250℃, depending on the core.
• Mechanical strength dependent on core selection.
• Pressure≤4 Mpa

Category Download: Junio-G-sheet-style Non Metallic Flat Gaskets  

DIMENSION

ASME B16.21, DIN2690, and any sizes any special shapes according to your requirement.

Order example:

• G822 , ASME B16.21, RF, 2mm
• Made from JUNIO style 822 Non-asbestos sheet. Dimension is based or ASME B16.21 RF flange, thickness is 2 mm, (Note: FF flange, gaskets normal with holes)

Junio G840M is PTFE gasket used filler materials such as glass fiber, carbon fiber and graphite etc. The filled PTFE has improved compression strength, better abrasion resistance, high thermal conductivity and lower thermal expansion compared with pure PTFE products.

Several types of PTFE gaskets are produced to meet the most demanding application.

Category Download: Junio-G840 PTFE Gskets  

Junio PTFE offers a wide range of compounded products with good mechanical properties, electrical properties, thermal properties, chemical resistance, low friction coefficient and good resistance to wear.They can be mostly used in valve seats, bearings, requested to resin sliding and chemicals, elastic band for unlubricated compressors. An extended range of improved mechanical and processing properties can be additionally reached by combination of virgin PTFE and different fillers.

DIMENSION

• ASME B16.5, DIN, and any sizes any special shapes according to your requirement.
• Junio has more experience for manufacturing very small PTFE parts with high precise tolerance and large quantity, for example, inner or outer diameter with tolerance±0.02mm, of course, it is economical for you to choose suitable tolerance.
• While a gasket with outer diameter more than 1000mm, you maybe consider to use our JUNIO-TEX-340 Expanded PTFE Joint Sealant Tape as gasket, it is very easy and economical, Though we can offer you PTFE gaskets with maximum external diameter of up to 2000mm, and without any joints.