Control Valve

Throttle (Needle)Valve PP

RoHS2 Compliant

PP (Polypropylene) is applied for the body material to adapt to clean environment.

Resin
  • PP is used for the main resin parts. PP: PP: Excellent chemical resistance, high transparency, and ideal for clean environments.
Metal
  • SUS304 is used for the main metal parts. SUS304: Ideal for use where strength is required or in a chemical atmosphere.
Seal rubber
  • HNBR is used for the seal rubber material. HNBR: A material with improved ozone resistance by adding hydrogen to NBR. Ideal for low-concentration ozone countermeasures.
  • FKM is used as seal rubber material. FKM: Excellent in heat resistance, chemical resistance, and ozone resistance.
  • EPDM is used as the seal rubber material. EPDM: Excellent weather resistance, cold resistance, and ozone resistance. Care must be taken as it is less resistant to mineral oils.
  • No copper-based metallic material is used in flow paths
  • HNBR or FKM is used for the seal rubber material. *Some products are only compatible in the flow path.
  • No lubrication is used during assembly.

Options

  • Fluorine grease is used as grease, and the product is packaged in a clean room after cleaning with clean air.

Advantages

PP (Polypropylene) is applied for the body material to adapt to clean environment.

Easy to check sanitary condition.

Clear (semitransparent) color used for the resin body makes it possible to check visually the fluid (liquid) inside.

All parts are oil-free specification, which responds to a wide variety of request in various industries.

Metal parts are made of SUS304 and EPDM is used for seal material.

It is compatible with special specifications.

HNBR is used for seal material. FKM/HNBR specification is also available as option.

Two types of package are available.

Standard package and Clean-room package that items are washed by clean air, then packed in ISO class 6 equivalent cleanroom are available.

The screw specification can be chosen from Sealock treatment and no-Sealock treatment depending on applications.

Depending on customer's request, Sealock treat or Seal tape specification is available.

Achieved downsizing by renewed design.

Sealing rubber material: HNBR is newly added.
Inch size: ø1/4, ø3/8, ø1/2 are newly added.

Specifications

Fluid medium Air, Water, Others such as chemicals (Conditional*1)
Max. operating pressure 1.0MPa (at0~20℃)*2
Max. vacuum -100kPa
Operating temperature range 0~80℃ (No freezing)

Warning

*1. Make sure to follow the instructions below when the fluid medium is water or other liquid.

Surge pressure must be controlled lower than max. operating pressure when using water or liquid 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.

The specification above may not be applied, depending on the kind of chemicals or mixed gases used as a fluid medium. Make sure to use PISCO products after verifying their suitability on the user side.

Warning

*2. If operating temp. exceeds 20℃, refer to the following chart "Relation of Operating Temp. & Max. Operating Pressure"

Port size

Tube dia.

mm size(mm) φ4, φ6, φ8, φ10, φ12
inch size φ1/4, φ3/8, φ1/2

Thread size

Metric male thread M3x0.5, M5x0.8
Taper pipe male thread R1/8, R1/4, R3/8, R1/2

Flow Characteristic Graph

Type & Price list

Detailed Safety Instructions

Warning

1.Check the chemical resistance before use when the fluid medium is a chemical or mixed gas. Depending on the usage conditions, it may cause damage to the fitting body, disengagement of the tube, or leakage.

2.Do not use the product if it does not satisfy all the conditions listed in the specifications when the fluid medium is water or liquid. It may cause damage to the fitting body, disengagement of the tube, or leakage.

3.To adjust the speed of the actuator, gradually turn the needle from the fully closed position to increase the air volume. If the needle is open, there is a risk of the actuator move suddenly and violently. Turning the needle clockwise closes the valve, while turning it counter-clockwise opens it.

4.When adjusting the flow rate of the equipment, the needle should be turned to open gradually from the fully closed position. If the needle is in open position, a high flow rate will be instantly applied to the equipment and there is a risk of damage to it.

5.Resin can be deteriorated by being exposed to direct sunlight or ultraviolet rays.

Caution

1.Leakage is allowed for the control flow even when the needle is fully closed position and should not be used in such a way that zero leakage is required.

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 thread 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 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.

Frequently Asked Questions for Control Valve Series

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.