Specifications - City of Montpelier, Vermont

Title:Montpelier District HeatingCity of Montpelier, VT15055– Basic Piping Materials and MethodsIssue Date:September 28, 2012Page #:5 of 10a. Perfection Corp.b. Tyco/Grinnellc. VictaulicE. YType Strainers: Provide strainers full line size of connecting piping, with endsmatching piping system materials. Screens shall be Type 304 stainless steel, with20 mesh perforations. Provide strainers with 125 psi working pressure ratingexcept 250 psi pressure rating for systems 100 psig or greater.1. Threaded Ends, 2" and Smaller: Cast iron body for steel piping systemsand cast bronze body for copper piping systems, screwed screen retainerwith centered blowdown fitted valve and pipe plug, blowdown valve sizeto match blowdown size (no bushing or reducers).2. Flanged Ends, 2½″ and Larger: Cast iron body, bolted screen retainerwith off center blowdown fitted with valve and pipe plug.3. Manufacturers:a. Armstrong Machine Works.b. Hoffman Specialtyc. Metraflex Co.d. Spirax Sarco.e. Watts Regulator Co.F. Mechanical Sleeve Seals: Modular mechanical type, consisting of interlockingsynthetic rubber links shaped to continuously fill annular space between pipe andsleeve, connected with bolts and pressure plates which cause rubber sealingelements to expand when tightened, providing watertight seal and electricalinsulation.1. Thunderline Corp.2. Calpico3. Metraflex CompanyBASIC PIPING MATERIALS AND METHODS150555