2 port valves stuck open

[dono]

Hi, can anyone advice me what to do with 2 stuck open port valves.
The handles/switches are really loose.
Put WD40 on them, tapped them but can't get them to work.
Is this the type that can be taken off and changed or is it a drain situation?
Any help would great, thanks.

 

[E4gas]

Hi, can anyone advice me what to do with 2 stuck open port valves.
The handles/switches are really loose.
Put WD40 on them, tapped them but can't get them to work.
Is this the type that can be taken off and changed or is it a drain situation?
View attachment 21426 Any help would great, thanks.

The head looks replace able , is there a little bump on the silver ( honey well ) cover

 

[stevetheplumber]

the handles will be floopy if the valve is powered to open have you tried switching of the powert to the system and trying them looking at that spring in the pic it appears to be open

 

[dono]

Honeywell and I think there is a bump on cover. I'll check again. Thanks.