VACUVENT 025VA25, Руководство пользователя

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Independent Valve Marketing (Pty) Ltd
Engineering Page 11 of 18
VSS0203WD00
General Information
FUNCTIONAL TESTING AND OVERALL INSPECTION
Before final release all valves will pass the following functional and visual tests:
1. Pneumatic Drop Test
Purpose: Simulation of anti-shock air release
Criteria: Pneumatic relay must open to release large quantities of air
2. Low Head Seal Test
Purpose: Check seal of the valve under no more than 2.75 Psi
Criteria: Drip dry seal
3. Hydrostatic Test
Purpose: Test valve integrity at no less than 1.5x the rated operating pressure
Criteria: No leaks on the seal or body
4. Pipeline Simulation Drop Test - Only on 10% of Valves
Purpose: To simulate the introduction of air in a filled pipeline under pressure
Criteria: Small orifice release of air up to working pressure
Anti- shock opening up to working pressure
5. Visual Inspection
Purpose: Ensure quality of the product
Criteria: No visible oil, dirt or debris on the inside or outside of the valve
No damage to corrosion protection systems
No visible rust
CORROSION PROTECTION
Vacuvent Air valves consist of stainless steel, polymer based and mild steel components; mild steel
components are fusion bonded epoxy coated to prevent corrosion to a minimum thickness of 250
microns DFT.
Screw thread of stainless steel components interacting with mild steel are wet paint assembled
using a two pack epoxy approved for use in potable water to prevent galvanic corrosion.
SHIPPING
Vacuvent air valves are packaged in sturdy container after being wrapped in shock absorbent
materials to ensure that the valve reaches its destination in good working condition.