The actuator on my automated valve operates, but the valve won’t turn. Why?

Most likely the valve stem or actuator coupling is broken.

Why doesn’t my valve open or close completely when the actuator operates it?

The electric actuator limit switches or the pneumatic actuator position stops are not correctly adjusted.

When I energize the solenoid on my pneumatic actuated valve, the valve won’t turn. How come?

Probably because there is no air pressure to the solenoid or dirt has jammed it. Also, debris might be trapped inside the valve. Or, the air pressure is not sufficient to operate the actuator. Remember: measure air pressure at the actuator, not at the compressor.

Can I buy an actuator from one manufacturer and mount it to a valve from another manufacturer?

Maybe. First, be sure that the actuator torque output is sufficient to turn the valve reliably. Second, you will have to fabricate a custom mounting bracket and coupling to connect the actuator to the valve.

What happens if I lose power to my electric actuator in the middle of an actuation cycle?

The valve will stop somewhere between full open and close. When power is reapplied to the original circuit, the actuator will complete the cycle.

I ordered a fail open pneumatic actuated valve by mistake. I needed a fail closed one. What can I do?

To make the change just remove the actuator from the valve and turn it, or the valve stem, 90 degrees and remount the actuator.

I’ve installed my automated valve in the line, but now I don’t know if the valve is in the open or closed position. How can I find out?

Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.

Do I have to have the solenoid valve that controls the air supply to my pneumatic actuator mounted right on the actuator?

Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.

How do I wire up my electric actuator?

Check the electric wiring schematic that came with the actuator for the correct hookup. Sometimes a copy is inside the actuator cover. If it is missing, don’t guess about the connections. Call the manufacturer for a schematic.

I’ve just installed an electric actuated valve and when I power it, it turns the valve 360 degrees and won’t shut off. What’s wrong?

The actuator is wired incorrectly (check the schematic accompanying the actuator), or the external control switch is not the correct type for the actuator.

My electric actuators cycle time is way too fast, can I slow it down?

Not unless you bought it with an optional speed control.

I just replaced a solenoid valve with an electric actuated valve and it won’t work. Why?

Actuators and solenoid valves require different types of electrical control switches. SPDT for actuators, SPST for solenoids. Check the actuator wiring schematic for the correct wiring and switch type.

COVNA HKFP Anti Corrosive PTFE Solenoid Valve - COVNA: Industry-Leading Manufacturer of High-Performance Valves

COVNA HKFP Anti Corrosive PTFE Solenoid Valve

HKFP Anti Corrosive PTFE Solenoid Valve

with isolated diaphragm construction to rot-proof PTFE body for corrosion resistance. Suitable for most of the corrosive mediums. Widely used in the chemical industry, cosmetics industry and so on. COVNA supplies various kinds of solenoid valves such as anti-corrosive types, water-proof types, and general-purpose types for your applications. Consult us to get the valve solution!

Model

Funkcija: Normalno zaprto
Pressure: 0 to 1.5 bar
Napetost: DC-12V, 24V; AC-24V, 120V, 240V/60Hz; 110V, 220V/50Hz
Temperature of Media: -5 to 50℃
Suitable Media: Corrosive fluid and gas, acid, alkali, etc
Valve Material: PTFE

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Features Of COVNA HKPF PTFE Solenoid Valves:

● With isolated diaphragm construction to rot-proof PTFE body for corrosion-resistant

● Suitable for acid, alkali, medical, and other mediums

● Widely used in the medical industry, medical industry and other applications

● Excellent anti-corrosion performance

● Responsive for flow control

Technical Parameters Of COVNA HKPF PTFE Solenoid Valves:

Velikost pristanišča	1/8″, 1/4″, 3/8″, 1/2″, 1″	Odprtina (mm)	3, 6
Nit pristanišča	G, NPT	Funkcija	Normalno zaprto
Tlak	0 to 1.5 bar	Napetost	DC-12V, 24V; AC-24V, 120V, 240V/60Hz; 110V, 220V/50Hz
Temperatura medija	-5 do 80 ℃ (23℉ do 176℉)	Primerni mediji	Corrosive fluid and gas, acid, alkali, etc
Material	PTFE	Toleranca	±10%

Velikost	Velikost pristanišča	Odprtina (mm)	Cv	Minimalni tlak	Največji tlak
Velikost	Velikost pristanišča	Odprtina (mm)	Cv	Minimalni tlak	AC(24VA)	DC(18W)
HKFP2130	1/8″	3.0	0.1	0,0 MPa	0.3 MPa	0.3 MPa
					AC(20VA)	DC(28W)
HKFP2160	1/4″	6.0	0.28	0,0 MPa	0.15 MPa	0.15 MPa
HKFP2160	3/8″	6.0	0.28	0,0 MPa	0.15 MPa	0.15 MPa
HKFP2160	1/2″	6.0	0.28	0,0 MPa	0.15 MPa	0.15 MPa
HKFP2160	3/4″	6.0	0.28	0,0 MPa	0.15 MPa	0.15 MPa
HKFP2160	1″	6.0	0.28	0,0 MPa	0.15 MPa	0.15 MPa

Dimension of COVNA HKPF PTFE Solenoid Valves:

Velikost pristanišča	3/8", 1/2″, 3/4″, 1″, 1¼", 1½", 2″	Odprtina (mm)	15, 20, 25, 32, 40, 50
Povezava s pristaniščem	BSPP, BSPT, NPT, prirobnica	Funkcija	Normalno zaprto ali odprto
Tlak	0,00MPa-1,0MPa	Napetost	DC-12V, 24V, AC-24V, 120V, 240V/60Hz; 110V, 220V/50Hz
Temperatura medija	NBR Tesnilo: 0 ~ 80 ℃ Tesnilo EPDM: 5 ~ 190 ℃	Primerni mediji	Alkalije Kisline in soli itd.
Material	UPVC, CPVC	Material za tesnjenje	EPDM, VITON, NBR, PTFE
Tuljava	YC1B , 15W ( AC ) , 16W ( DC )
Tuljava	YELB, začetek pri 200 W, vzdrževanje pri 5 W (AC), 28 W (DC)
Tuljava	YF1B, začetek pri 350 W, vzdrževanje pri 10 W (AC), začetek pri 75 W, vzdrževanje pri 25 W (DC)

Pogon na mojem avtomatiziranem ventilu deluje, vendar se ventil ne obrne. Zakaj?

Najverjetneje je zlomljeno steblo ventila ali sklopka pogona.

Zakaj se moj ventil ne odpre ali zapre v celoti, ko ga pogon upravlja?

Končna stikala električnega pogona ali pnevmatski omejevalniki položaja pogona niso pravilno nastavljeni.

Ko vklopim elektromagnet na svojem pnevmatskem ventilu, se ventil ne zavrti. Kako to?

Verjetno zato, ker v elektromagnetu ni zračnega tlaka ali pa se je v njem zataknila umazanija. V ventilu so lahko ujete tudi nečistoče. Ali pa zračni tlak ni zadosten za delovanje aktuatorja. Ne pozabite: zračni tlak izmerite na aktuatorju in ne na kompresorju.

Ali lahko kupim pogon enega proizvajalca in ga namestim na ventil drugega proizvajalca?

Morda. Najprej se prepričajte, da je izhodni navor pogona zadosten za zanesljivo vrtenje ventila. Drugič, izdelati boste morali montažni nosilec in spojko po meri za povezavo pogona z ventilom.

Kaj se zgodi, če električno gonilo izgubi napajanje sredi cikla sprožitve?

Ventil se ustavi nekje med popolno odprtostjo in zaprtostjo. Ko se v prvotni tokokrog ponovno dovede električna energija, bo aktuator dokončal cikel.

Po pomoti sem naročil pnevmatski ventil, ki se odpira po pomoti. Potreboval sem neuspešno zaprtega. Kaj lahko storim?

Za spremembo samo odstranite aktuator z ventila in ga ali steblo ventila obrnite za 90 stopinj ter ponovno namestite aktuator.

V linijo sem namestil samodejni ventil, vendar zdaj ne vem, ali je ventil v odprtem ali zaprtem položaju. Kako lahko to ugotovim?

Odstranite pogon z ventila in preverite steblo ventila. Pri večini krogelnih ventilov je steblo plosko pod pravim kotom glede na tok, ko je ventil v izklopljenem položaju. Pri metuljnih ventilih preverite oznako puščice za pretok na steblu.

Ali mora biti elektromagnetni ventil, ki krmili dovod zraka v pnevmatski pogon, nameščen neposredno na pogon?

Kako priključim električni pogon?

Pravilno priključitev preverite v shemi električnega ožičenja, ki je priložena aktuatorju. Včasih je kopija v pokrovu aktuatorja. Če je ni, ne ugibajte o priključkih. Za shemo pokličite proizvajalca.

Pravkar sem namestil ventil z električnim pogonom in ko ga vklopim, se ventil obrne za 360 stopinj in se ne izklopi. Kaj je narobe?

Pogon je napačno ožičen (preverite shemo, ki je priložena pogonu) ali pa zunanje krmilno stikalo ni pravilnega tipa za pogon.

Čas cikla mojega električnega pogona je prehiter, ga lahko upočasnim?

Ne, razen če ste ga kupili z dodatnim nadzorom hitrosti.

Pravkar sem zamenjal elektromagnetni ventil z električnim ventilom in ne deluje. Zakaj?

Aktuatorji in elektromagnetni ventili zahtevajo različne vrste električnih krmilnih stikal. SPDT za aktuatorje, SPST za elektromagnetne ventile. Za pravilno napeljavo in tip stikala preverite shemo napeljave aktuatorja.

Ste še vedno zmedeni? Kontaktirajte nas!

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COVNA HKFP Anti Corrosive PTFE Solenoid Valve

HKFP Anti Corrosive PTFE Solenoid Valve

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