Chemplants doc example failed

Question

I want to use check valve pic as described on chemplants doc at page 54, but I get an error saying it's not defined. I know it could be an error of the package, but I want to be sure and see if it's defined in another way. It's possible to print all tiks/pics available? or how should I face this problem ?

\documentclass{article}
\usepackage[utf8]{inputenc}

%%%
\usepackage{tikz}
\usepackage{chemplants}
%%%

\begin{document}


\begin{tikzpicture}
    \pic at (0,0) { check valve = main };
\end{tikzpicture}

\end{document}

Package pgfkeys Error: I do not know the key '/tikz/pics/check valve', to which you passed 'main', and I am going to ignore it. Perhaps you misspelled it.

Currently I create my own command, but it's really a crude attempt (I'm new at tikz, so I don't know how to define coordinates for a pic and it doesn't even see proportional when I use the scale option)

\tikzset{
    check-valve/.pic={
        \draw (0,-2mm) -- (0,0);
        \node[minimum size=3pt,draw,circle,fill, inner sep=0pt, outer sep=0pt] at (0,0) {};
        \draw (0,0) -- (4mm,-2mm);
        \draw (4mm,-2mm) -- (4mm,0);
    }
}

Answer 1

Your code works for me in Texmaker (MikTex), with quick build options being PdfLatex or LuaLatex.

\documentclass{article}
\usepackage[utf8]{inputenc}

%%%
\usepackage{tikz}
\usepackage{chemplants}
%%%

\begin{document}
  \begin{tikzpicture}
    \pic at (0,0) { valve = main };    
    \pic at (2 ,0) { check valve = main };
  \end{tikzpicture}
\end{document}

Result

Some guesses why your compile might fail:

• hidden typo
• tikz not installed