FAST AIR

COAXIAL PNEUMATIC VALVES

COAXIAL PNEUMATIC VALVES

Single/Double
acting ones valves

Alpha pompe S.p.A. manufactures Coaxial Pneumatic Valves, and it sells them with “FASTAIR” mark. The above mentioned valves series is composed of six different models, going from DN 15 (1/2″) to DN 50 (2″). There are two different Coaxial Pneumatic Valves versions: the double acting ones (DA) and the single acting ones (SR). Fastair Coaxial Pneumatic Valves are equipped with on-off operator and are suitable for group 2 type fluids (not dangerous).

Inside the coaxial valves there is a pneumatic start up, it can be commanded through a 1/8” GAS/NPT interface or through a Namur electro valve. The pneumatic doors are powered one after the other, this lets the valve open or close. Interception valves aren’t normally suitable for great bearings, on the contrary they are perfect for pneu-matic purposes and as control valves. They could not replace the couple actuator-valve but they are useful in easing application in different places, basing on different needs. There are several surface treatments that can be applied on the whole product range, in order to satisfy the customer requirements (anodizing, chemical nickel plating or hard anodizing + PTFE coating).

VALVESDNSIZEDASR
FA10
FA15DN151/2″
FA20DN203/4″
FA25DN251″
FA32DN321″ 1/4
FA40DN401″ 1/2
FA50DN502″
available – not available

FEATURES

PILOT FLUIDDry or lubricated compressed air, 30 um filtered (ISO 5873 Part 1, Class 5)
PILOT FLUID PORTS1/8″ GAS (optional NPT) NAMUR connection for 1/4″ solenoid valves
PILOT PRESSUREDA (double acting) = 3 – 8 BAR SR (spring return) = 4,3 – 8 BAR
FLUIDGroup 2 – NOT DANGEROUS
WORKING TEMPERATURE-40 + 150°C
WORKING PRESSUREMAX 16 BAR (PN 16)
VACUUM SEALING740 mmHg (97,4%)
VALVE THREADGAS UNI 221

Treatment

HARD ANODIZING Electrolytic process that produces an anodic layer on aluminum (ALUMINE), with 50 um thickness. Alumine is one of the hardest known materials, surface hardness 400-600 HV (45-65 HRC). Its mechanical properties and chemical resistance are well appreciated.

ELECTROLESS NICKEL-PLATING Electroless chemical process gives a nickel and phosphor (max 12%) layer. 20 um constant thickness also on shapes, blind-holes, threads and recesses. Surface hardness 400-480 HV (45-55 HRC).

HARD ANODIZING + PTFE COATING It is a further improvement of hard anodizing, with a 20 um coating made of PTFE. Oxide hardness (for internal parts subject to wear), and excellent chemical/thermal resistance of PTFE (for external surfaces subject to corrosion) are summed.

Operation is indipendent from internal fluid pressure. Easy assembly in any position, no external moving part. Double sealing on fluid for long duration. Low air consumption. Type “B“ seat (6,5×3,5 mm) on body for proximity micro-switch.

Aluminium adhesive nameplates, with progressive serial number punched. Running test and 100% seal test carried out with electronic equipment and certification of each individual product.

PART MATERIALSTANDARD TREATMENTSSPECIAL TREATMENTS
BODY EN AW 6063 Extruded AluminiumHard anodizing 50 umChemical nickel-plating or PTFE coating
COVER EN AB 46400AluminiumAnodizing 30 umChemical nickel-plating or PTFE coating
PISTON EN AW 6063 Extruded AluminiumHard anodizing 50 um
DIAPHRAGM AISI 316 Stainless Steel
GASKETS NBRFPM/FKM, Silicone
SPRING AISI 302 Stainless Steel

Optional: Magnetic ring for proximity micro-switch