Fitting
Rotary joint SUS304
Push-in fittings for rotary section piping in corrosion-resistant environments.
Water specification type (RWL) can be used with water.
-
No copper-based metallic material is used in flow paths
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No lubrication is used during assembly.
Advantages
Push-in fitting for rotary section piping in corrosion-resistant environments.
Push-in fitting for swinging and rotating applications made of SUS304 that can be used with water.
*Only water specification (RWL) can be used with water.
Two types are available according to the fluid medium: water specification type (RWL) and air specification type (RAL).
Chemical-resistant and corrosion-resistant PPS, SUS304, etc. are used for the fluid contact parts.
No copper-based metal material is used in airflow path.
Parts that come in with fluids are oil-free.
*Parts not in contact with fluid are not oil-free.
EPDM is used as seal packing material.
Seal packing material: FKM is available as an option.
Seal tape-wrapped threads are available as an option.
*Add "-TP" at the end of the model number.
Specifications
Water spec. (RWL)
| Fluid medium | Water, other liquids （conditional*） |
|---|---|
| Max. operating pressure | 0.7MPa |
| Operating temp. range | 0～60℃（No freezing） |
| Allowable rotation | 500min-1 |
Warnings
* Make sure to follow the instructions below when the fluid medium is water.
Surge pressure must be controlled lower than max. operating pressure when using water as a fluid medium.
Tap water in Japan free from foreign substances or contamination can be used. Carry out the evaluation under an actual operating condition for using other kind of water.
Be sure to place Insert Ring (WR) into the tube edge when using water or liquid as a fluid medium.
As for chemicals, etc., they may vary depending on the conditions of use, so please check the compatibility of our specifications before use.
Air spec. (RAL)
| Fluid medium | Air, other gases (conditional） |
|---|---|
| Max. operating pressure | 0.7MPa |
| Max. vacuum | -100kPa |
| Operating temp. range | 0～60℃（No freezing） |
| Allowable rotation | 500min-1 |
Warnings
As for mixed gas, etc., they may vary depending on the conditions of use, so please check the compatibility of our specifications before use.
Port size
Tube dia.
| mm size (mm) | φ4, φ6, φ8, φ10, φ12 |
|---|---|
| inch size | φ1/4", φ3/8", φ1/2" |
*ø4mm same as ø5/32", ø8mm same as ø5/16" Specify 4 for ø5/32 and 8 for ø5/16
Thread size
| Metric male thread | M5x0.8, M6x1 |
|---|---|
| Taper pipe male thread | R1/8, R1/4, R3/8, R1/2 |
| UNF thread | 10-32UNF |
| NPT thread | NPT1/8, NPT1/4, NPT3/8, NPT1/2 |
Construction
Type & Price list
Detailed Safety Instructions
Warning
1.When fluid leakage occurs, immediately close the valve to stop the fluid and stop using the product. Continued use with fluid leakage may cause a serious incident.
2.Check chemical resistance before using the products, when the fluid medium is chemicals, solvent or mixed gases. Depending on the usage conditions, it may cause damage to the fitting body, disengagement of the tube, or leakage.
3.This product is available in different seal rubber materials, but there is no identification based on seal material. Make sure not to mix the product with other seal materials when opening the packaging. Mixture may cause unexpected situations.
4.PP resin can be deteriorated by being exposed to direct sunlight or ultraviolet rays.
5.Install a filter or strainer on the secondary side of the product to prevent possible contamination of seal material wear debris.
6.Use the product applicable to the fluid to be used. Use of fluids other than those specified may cause damage to the product or leakage.
Caution
1.PPS resin has the property of discoloring when exposed to direct sunlight, fluorescent light, mercury light, and high temperature atmospheres for a long period of time, but discoloration does not affect performance.
2.Note that EPDM (sealing rubber material) is not suitable for piping in general pneumatic circuits due to its inferior resistance to mineral oil-based oils.
3.No sealock (thread sealant) is coated on taper pipe thread, be careful when installing them. When using sealing tape, sealing agent, etc. on the thread, wrap or apply it leaving 1.5 to 2 threads from the thread point.
4.Tube connection into a tube fitting is harder than that of standard spec. due to its oil-free specification. When using, make sure that the tube is inserted all the way to the tube end of the fitting. When inserting a tube, apply a liquid that is not problem to use on the tube surface to improve smoothness of tube connection.
5.The corrosive and dusting properties of the fitting depend on the operating environment. If there is concern about adverse effects on machinery or equipment, evaluate the adoption of the product in accordance with the operating conditions in advance.
6.Do not apply a radial load. It may shorten the service life.
7.For violent oscillations or swings, use polyurethane tubes. Rigid (hard) tubes, such as nylon tubes, can be a source of radial loading.
8.Over-tightening with excessive torque can deform the metal hexagonal column and cause structural rotational failure and leakage.
9.Use clean fluid, as foreign matter on the rotating seal surface may cause a decrease in product life. Remove foreign matter from the piping when piping.
10.Rotational torque may vary depending on the used fluid and operating conditions.
11.Do not leave any liquid residue inside the product when the machine is not operated for a long period of time. It may affect the function and life of the product.
12.This product generates heat by rotation and may become hot depending on the operating pressure and rotation speed. When touching the product, make sure that the temperature has cooled down sufficiently after the rotation is stopped.
13.When using this product in the opposite rotation of the screw tightening direction, the screws may loosen, and periodic maintenance and retightening should be conducted.
Frequently Asked Questions for Fitting Series
Because Push-in fitting seals outside diameter of tube by an elastic-sleeve (rubber seal), there may be a factor causing leak, such as scratches, deformation or jamming of contaminants.
The fittings are designed for pressurized air piping, then they cannot be used for the circuit of gas or liquid which becomes a risk upon leakage, or for an inspection equipment which becomes easily affected by even slight leak.
When disconnecting a tube from push-in fitting, please pull out the tube with sufficiently pushing the release-ring. When you are not used to use push-in fitting, you tend to pull the tube before pushing the release-ring enough so that the lock-claws still bite the tube and it brings difficulties in releasing the tube.
With standard Pisco push-in fittings, the resistance to the fixed durability test is 30 million cycles, and to the sliding movement is 5 million cycles.
Fixed durability test: it is the number of cycles that satisfies air tightness with no-damage, when applying and releasing 0.7MPa air at the frequency of 2 cycles/sec. Dynamic durability test: it is the number of cycles that satisfies the condition of the fixed durability test with oscillation move at frequency of 2 cycles/sec.
Although it may be questioned by durable years (time), since it changes sharply according to an operating condition, it is too difficult to answer in number of years (or hours).
Operating pressure is set by each models. Operating pressure of Standard PISCO Push-in fitting is 1.0 MPa.
Please be sure to check the specifications of each model as the working pressure may change depending on the temperature, such as Tube Fitting PP.
The maximum working pressure stated in the specifications is not the breaking pressure, so even if the maximum working pressure is exceeded, it will not break immediately, but for safety, use it within the specifications. Please note that the warranty does not cover if the product is used in excess of the maximum working pressure.
Except for SUS316 and Brass compression fitting series, elbow fittings of almost all other series can rotate its head. (It is possible to rotate at the connection of metal and resin parts.)
However, rotating the head in this case means that it can turn with fingers, in order to adjust the position of tube output port after screwing in the fitting. If it is necessary to turn the fitting port according to rotation or oscillation of a tube, Rotary Joint or High Rotary Joint built-in ball bearing should be used.
Difference between Standard fitting and Rotary/High-rotary joint
We may be able to prepare combinations of tube diameter and screw size that are not listed in the catalog.
Please contact the nearest sales office for details.
One-touch fittings can be connected as long as the outer diameter of the tube is the same.
Please note that even if the outer diameter of the Barb Fitting and Compression Fitting is the same, they cannot be connected if the inner diameter is different.
Depending on the model types, water can be or cannot be run through. Standard Pisco push-in fitting can be used with water if the conditions are matched. The followings are the conditions to flow water.
1. Make sure to hold the surge pressure, which is temporally raising pressure when closing valve, under the maximum operating pressure.
2. Tap water can be run through. Since other types of water may match our specifications appropriately, please test and evaluate well on actual application in advance.
3. Use Insert-ring (tube inner core retaining pipe made of stainless steel).
Use of Insert-ring is recommended to prevent tube shrinking when using water for a long period of time since tube shrink may cause tube loosing or leaking easily.
Basically it is not possible.
A very soft tube as soft as squashed with fingers is difficult to insert to a push-in fittings. Even it could be inserted, drawing strength is weak and it may be easily slipped through.
Although PISCO Vacuum Tube (UD) is soft that can be squashed with fingers, it can be used for push-in fittings by installing Insert Ring (Pipe-shaped ring made of stainless steel to be installed into inner side of the tube).
Pisco does not offer fittings for rubber hose in principal.
*) However, some Die-temperature control fitting series can be connected to heat-resistant hoses.
PISCO products are designed and developed to be used in both positive and negative (vacuum) pressure environment in the premises. You can rest assured on the use at negative pressure.
Thread part of most PISCO fittings are coated by sealing compound called "Sealock". So you don't have to wind a seal tape around a screw.
However, some products such as SUS316 push-in fitting and PP fitting are not processed by Sealock thus, you should wind up suitable seal tape or apply suitable sealing compound depending on the application.
Even Sealock processing type, the coating may come off after a couple of times of screw-in and then the sealing effect may decrease. Take the same measure as no-Sealock type when needed.
Rather than "Straight type (PC)" which is fixed by fastening hexagonal nut at outer body by a wrench, "Inner hexagonal Straight (POC)" is suited for narrower space because it can be fixed by fastening hexagonal hole at inner diameter side by hexagonal wrench.
Furthermore, mini type is smaller than standard type and more effective.
When low height is required due to fixing spatial reason, we recommend single banjo-type (PH) and hexagonal holed banjo-type (POL) rather than standard elbow-type (PL).
Comparing the heights of ⏀6mmXR1/8 size, standard elbow-type (PL6-01) is 33.55mm, single banjo-type (PH6-01) is 27mm and hexagonal holed banjo-type (POL6-01) is 24mm.
Considering mini-type is also effective measure if same size is available in product line up. (Height of standard elbow-type mini series (PL6-01M) is 22.25mm)
You can connect and disconnect multiple piping at one time by using Connector.
One unit of Connector can connect and disconnect two piping at one time. By combining Connectors in lengthwise and sidewise by connector band, number of piping to be managed at one time will increase.
Light Coupling series is available.
For compatibility with other companies, please contact the nearest sales office.
For the size of the hole to be drilled in the panel, refer to the M dimension of the product, and for the thickness of the panel, refer to the A dimension and T dimension.
Example: Bulkhead union PM4
Since the M dimension is M12 x 1, the diameter is 12 mm. But, if the panel hole is made exactly 12 mm, the main body may get caught and it may be difficult to pass through, so please allow a little margin.
The thickness of the panel is dimension A (length of screw part)-(2 x T (thickness of nut)), so in this case 14.8- (2 x 4) = 6.8 mm is the maximum thickness of the panel.
When installing the product in the panel hole, remove the nut once, pass the product body through the hole, and then tighten the nut again to fix the product to the panel.
PISCO uses PTFE (polytetrafluoroethylene).
PTFE is one of the typical fluororesins and is used for water- and oil-repellent coatings on frying pans and the like.
Pure water and extra-pure water have no effect on PISCO product. These waters should be used by a customer's responsibility with paying attentions to the possibilities of spill of part material components, oils applied to a product, or tube additives.
Influence by the use with industrial water is non-predictable. Customers should test and evaluate it by the actual use in advance on their own.
Gray-water and sewer water is not allowed to flow.
EPDM (ethylene‐propylene) rubber is excellent in heat resistance, ozone-proof, solvent resistance, and inorganic chemicals resistance. On the other hand, it does not tolerate general mineral oil, therefore it is not suitable for air circuit which involves oil in the circumstance.
But this is the notice only for general air circuit. When used for water, EPDM is the best suitable rubber material.
Gaskets for metric threads equipped with our products are sold solely in principle. The minimum order quantity is 10 pcs.
Model code is different by the product for which a gasket is used and by size. Please contact the sales office where you purchased the product or Nihon Pasco Overseas Operation Team.
Model code is different by the product for which a gasket is used and by size. Please contact the sales office where you purchased the product.
Tighten the resin type screws to the point where they can be stopped by hand, and then use a tool such as a spanner to tighten them two to three turns. If the resin type of the threaded part is used for a long time, the screw may loosen due to creep deformation and a slight amount of leakage may occur. Therefore, perform regular inspection and retightening. If the retightening does not improve, replace it with a new product.
Inquiries about this product
It is also possible to suggest products suitable for various conditions such as applications and functions. Please feel free to contact us or visit the nearest sales office.
The following are frequently asked questions. Please check before making inquiries.
