One kind of fitting accessories is a needle valve VM-1-R7R with 316ss materials used. This product can operate in medium temperature and it works on pressures. It has no vent port and is packed by graphite. It can be ordered through Valvo VM-1-R/R/_, weldable stainless steel connectors (316ss and K11562), connectors with 012 or 014 clamping ring.