Technical Resources
Maintenance guides, installation manuals and instructional videos for Viscoreg valve products
Maintenance Guides & Manuals
(8)Pinch Valve Sleeve Replacement Guide
Step-by-step procedure for replacing EPDM, natural rubber and NBR sleeves in enclosed and open-body pinch valves. Includes torque specs and sleeve selection table.
Resilient Seal Gate Valve – Installation & Commissioning Manual
Complete installation instructions for SANS 664 / BS1218 resilient gate valves DN50–DN600. Covers flange alignment, bolt torque sequences, hydrostatic testing and stem seal replacement under pressure.
Pressure Safety Valve Calibration & Set-Pressure Adjustment
Field calibration procedure for spring-loaded PSVs to ISO 4126-1 / ASME VIII. Includes test bench setup, set-pressure adjustment, blowdown ring settings and re-seating verification.
Butterfly Valve Seat & Disc Replacement Manual
Detailed seat removal and disc replacement procedure for wafer and lug butterfly valves DN50–DN600. Covers actuator decoupling, seat vulcanisation inspection and ISO 5211 re-mounting.
Swing & Dual-Plate Check Valve Maintenance Guide
Inspection intervals, disc & spring replacement, and hinge pin service for swing and double-door check valves in municipal and pump-station service.
Valve Actuator Selection & Sizing Guide
Engineering guide for sizing pneumatic, electric and hydraulic actuators. Includes torque calculation tables for all Viscoreg valve families, ISO 5211 interface reference and fail-safe selection criteria.
Y-Strainer & Basket Strainer Cleaning Procedures
Recommended cleaning intervals, screen inspection criteria and gasket replacement procedures for PN16 Y-strainers and basket strainers in water, HVAC and industrial service.
Globe Valve Packing Gland Replacement (Live Pressure)
Safe procedure for replacing renewable PTFE and graphite gland packing under live pressure on rising-stem globe valves. Includes PPE requirements and valve position locking protocol.
Instructional Videos
(6)
Replacing a Sleeve in a Heavy Duty Enclosed Pinch Valve
Watch a technician safely depressurise, remove and reinstall an EPDM sleeve in a DN200 flanged pinch valve. Covers tooling, torque and sleeve orientation.
How to Calibrate a Spring-Loaded PSV on a Test Bench
Demonstration of setting the pop-off pressure, blowdown ring adjustment and leak-before-seat verification for a DN50 spring-loaded PSV.
Replacing the Stem Seal Under Pressure – Resilient Gate Valve
Field demonstration of replacing the EPDM O-ring stem seal on a SANS 664 gate valve with the valve in the fully open position while the line remains live.
Mounting a Pneumatic Actuator to an ISO 5211 Butterfly Valve
Step-by-step guide to selecting, aligning and commissioning a quarter-turn pneumatic actuator on a wafer butterfly valve — including solenoid and limit switch wiring.
Valve Hydrostatic Pressure Testing Procedure
Overview of shell and seat hydrostatic test setups per EN 12266-1. Covers test rig connections, pressurisation ramp, hold times and acceptance criteria.
NBR Seat Replacement in a Wafer Knife Gate Valve
Removing and replacing the replaceable NBR seat ring in a DN150 wafer knife gate valve — including gland packing adjustment and leak-off test.