GB/T 32290-2015Reduced-wall,Resilient-seated gate valves for water supply service (English PDF)

1 Scope

This standard specifies the terms and definitions of the flexible sealing valve (hereinafter referred to as the gate valve) for the water supply system, the structural type, the technical requirements,

Test methods, inspection rules, signs, supply requirements and quality guarantee.

This standard applies to ductile iron flexible sealing valve. Applicable to the nominal pressure is not greater than PN16; medium for water, water temperature

Range 1 °C ~ 80 °C; when the valve is fully open medium flow rate of not more than 4.9m/s; nominal size DN50 ~ DN1200 of the dark rod-type gate valve and the public

Called DN50 ~ DN600 size of the gate valve.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article

Pieces. For undated references, the latest edition (including all modifications) applies to this document.

Metallic materials - Tensile testing - Part 1. Test methods for room temperature GB/T GB/T 825 rings screw

GB/T 1220 stainless steel bar

GB/T 3098.1 Fasteners - Mechanical properties - Bolts, screws and studs

GB/T 3098.6 Fasteners - Mechanical properties - Stainless steel bolts, screws and studs

GB/T 3452.1 O-shaped rubber seals for hydraulic applications - Part 1. Dimensions series and tolerances

GB 4208-2008 enclosure protection class (IP code)

GB/T 4956 Magnetic properties - Non - magnetic coating - Overlay thickness measurement - Magnetic method

GB/T 5796.1 Ladder thread - Part 1. Tooth type

Ladder thread - Part 2. Diameter and pitch series GB/T Ladder thread - Part 3. Basic dimensions

Ladder - type threads - Part 4. Tolerances GB/T 5796.4-2005

Paints and varnishes - Determination of film hardness by pencil method GB/T 6739-2006

GB/T 7760 Determination of bond strength of vulcanized rubber or thermoplastic rubber and hard sheet 90 ° peel method

Paints and varnishes - Tests for paint film GB/T 9286-1998

Metallographic test of nodular cast iron GB/T 9441-2009

GB/T 11211 Determination of bond strength of vulcanized rubber or thermoplastic rubber and metal - Two - plate method GB/T GB/T 11253 Carbon structural steel Cold rolled steel sheet and strip

GB/T 12220 Industrial Valve Marking

GB/T 12221 metal valve structure length

GB/T 12225 General purpose copper alloy castings - Technical conditions

GB/T 12227 general purpose ductile ductile iron pieces of technical conditions

GB/T 13927 Industrial valves - Pressure test

GB/T 17219 Safety evaluation criteria for drinking water distribution equipment and protective materials

GB/T 17241.6 Integral cast iron flanges

GB/T 17241.7 Technical requirements for cast iron pipe flanges […]