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Composite Push In Fittings |
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Nickel Plated Brass Fittings |
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D.O.T. Push To Connect Air Brake Fittings |
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DOT Approved Push To Connect Fittings, CA360 Brass material, Viton sealing, Loctite thread sealant, 100% Tested, Meets D.O.T. FMVSS 571.106 SAE J1131 Air Brake System Requirements
Composite DOT Air Brake Push In Fittings
How to order DOT Push In Fittings |
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Composite Push To Connect Tube Fittings |
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Inch Tube with NPT thread, Inch Tube With BSPP (G) Thread, Metric Tube With BSPT (R) Thread, Metric Tube With BSPP (G) Thread, Metric Tube With Metric Thread
How to order composite push in fittings |
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Push To Connect Schrader Valves |
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Inflation valves - Schrader valves - Push To connects to air springs and other components that use air lines to provide a manual inflation point. Tube size from 1/8", 1/4", 5/16", 3/8", 1/2" |
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Stainless Steel Push-In Fittings |
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316 stainless steel push-in fittings provide easy tube insertion and removal for rapid assembly. 316 stainless steel push in fittings are suitable for applications in corrosive environments where brass and acetal are typically prohibited.
316 Stainless Steel, Viton Sealing |
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NingBo Pace Pneumatics Co., Ltd.,
Contact Information:
Email: pace@china-pace.com
Email: emma@china-pace.com
Tel: (86) 153 8194 5096
Fax: (86) 574 8724 5124
Skype: pace-fred |
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Pneumatic Connection Solutions: Pneumatic Fittings, Pneumatic Push in Fittings and Pneumatic Connectors. |
News From NingBo Pace Pneumatics Co.,Ltd. |
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But they have short strokes due to the limitation of the diaphragm deformation. Diaphragm cylinders are mainly used in pneumatic clamping devices and the working occasions with short stroke.
(2) Air-hydraulic cylinders
When outside load is large enough, there may occur poor stability to the movement of a unique pneumatic cylinder. This can be solved by an air-hydraulic cylinder. Hydro-pneumatic working is achieved by mechanically coupling a pneumatic cylinder and a low-pressure hydraulic cylinder so that they have a common movement normally initiated by compressed air applied to the air cylinder. Liquids have slight compressibility and air flow is easy to control, which leads to a stable movement and an adjustable speed.
The normal configuration is back-to-back mounting with a common piston rod. The piston speed can be adjusted by throttle valve. Reservoir and check valve are used for oil compensation. In this circuit, the pneumatic cylinder only provides driving force and the stable movement depends upon the hydraulic cylinder by adjusting throttle valve. This circuit does not need any hydraulic source and thus is low in cost. In addition, it makes full use of pneumatic and hydraulic and thus finds many applications.
(3) Rodless cylinders
Recently-developed rodless cylinders provide an ideal solution for long stroke applications. In one rodless design the cylinder barrel has a slit along the barrel and the piston in the barrel is connected directly through the slit to a mounting on the outside of the cylinder.
Thus when the piston is moved by applying air on either side, the load connected to the external mounting is moved. The problem of providing a continuous and moving seal between the piston and sign handle long strikes effectively but can also accept lateral loading at the mounting point.
This is an illustration of the construction of one type of rodless cylinder. The drive from the piston to the carriage is via a substantial drive tongue which passes through the barrel slot. This drive tongue forms the center part of this yoke which is incorporated in the carriage extrusion. The piston halves are pinned to the lower part of this yoke, joining the piston to the carriage.
The volume between the piston seals, containing the yoke, is at atmospheric pressure. The pressure and dust slot seals are unclipped and parted by cam shapes in the yoke within this non-pressurized section and by the advancing movement of the piston carriage assembly along the cylinder.
After unclipping, the internal pressure seal slides under the lower part of the yoke adjacent to the piston halves, while the external dust seal slides over the upper part of the yoke within the carriage. The pressure and dust slot seals are then pressed together and re-clipped by the spring roller assembly in the carriage and the ramp shape of the piston and by the retreating movement of the piston carriage assembly along the cylinder body. Thus the drive is taken up from the piston to the carriage through the slot as this assembly traverses the cylinder.
(4) Impact cylinders
An impact cylinder is one arranged so that the speed developed is high enough for impact work, such as forging, piercing, etc. It converts the pressure energy of the compressed air into piston's high speed (more than ten meters per second) motion energy in a very short time.
This is an impact cylinder design. Compared with common cylinders, there is an extra middle lid (fitted with the cylinder body) with nozzle and exhausting small orifice. The cylinder is divided into three chambers by this middle lid and piston. For the sake of analysis, the working process can be simply divided into three steps.
1) Reset. The piston rod chamber is charged with air and the air in energy storing chamber exhausts out. The piston moves up until the seal gasket on the piston seals nozzle on middle lid. Piston chamber connects with the atmospheric via exhausting port. The pressure in chamber builds up to air source pressure, while the pressure in chamber falls down to atmospheric pressure.
2) Energy storage. When air enters chamber, it passes through the nozzle and acts on the piston. The area of the nozzle is so small that the air pressure cannot overcome the resultant of the up thrust (produced by air exhausting in the piston rod chamber) and the friction against the cylinder. The nozzle is still closed and the pressure in chamber builds up gradually.
3) Impacting. When the ratio of the pressure in chamber to that in the piston rod chamber surpasses the ratio of the acting area in the piston rod chamber to the nozzle area the piston moves down to open the nozzle. |
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