Introduction

This practical guide explains professional installation, routine maintenance, and diaphragm replacement for ASCO pulse valves (examples: G353A series, SCG353 series, SCEX353). Use it on your dust collector, baghouse, or pneumatic system to extend valve life and reduce downtime. Keywords for SEO: ASCO pulse valve, ASCO diaphragm, G353A041, SCG353A050, SCEX353.060, pulse valve diaphragm replacement, ASCO replacement diaphragm.

Safety first

Isolate and lock out air supply before any work.
Depressurize lines and bleed residual pressure.
Wear gloves and eye protection.
Follow site LOTO procedures.

Tools & materials

Basic tools: screwdrivers, hex keys, torque wrench, pliers.
Cleaning supplies: lint-free cloths, isopropyl alcohol, compressed air.
Replacement parts: OEM/compatible diaphragms (examples: C113443, C113444, C113825, C113685, C113928), O-rings, seals.
Optional: thread sealant, lubrication compatible with NBR/TPU/VITON (only if recommended).
Common ASCO valve models & diaphragm options 

G353 series: G353A041, G353A042, G353A045, G353A046, G353A048, G353A049 — matching part examples C113443, C113825, C113826, C113686.
SCG353 series: SCG353A043, SCG353A044, SCG353A047, SCG353A050, SCG353A051 — matching examples C113444, C113827, C113685.
SCEX353 series: SCEX353.060 — example C113928.
Diaphragm materials: NBR/BUNA (standard), TPU, optional VITON (high temp/chemical resistant).
Installation — step-by-step

Pre-check
Confirm valve model and diaphragm compatibility (match G353/SCG/SCEX models and ordering codes).
Inspect piping and mounting surfaces for contamination.

Mounting & orientation
Mount valve on a flat, rigid surface using manufacturer hole pattern; avoid twisting the valve body.
For pulse valves feeding a manifold, ensure correct inlet/outlet orientation and secure manifold clamps.
Maintain recommended clearance for coil access and service.

Pneumatic connections
Use correct fittings and thread sealant where needed. Tighten to appropriate torque.
Keep supply tubing short, smooth, and free of kinks. Use appropriate bore to avoid pressure drop.
Install a filter-regulator at the supply to deliver clean, dry air within 2–10 bar (common ASCO range).
Electrical / solenoid connections (if applicable)
Verify coil voltage and wiring polarity per valve nameplate.
Use proper connectors and maintain waterproofing for outdoor installations.

Initial commissioning
Gradually pressurize system, check for leaks.
Cycle valve and observe pulse strength and diaphragm seating.
Confirm correct pulse duration/timing on controller and adjust if needed.

Routine maintenance schedule

Weekly: visual inspection for leaks and external damage.
Monthly: check supply filter/regulator and clean/replace if needed. Verify tubing and fittings.
Every 3–6 months (or per running hours): functional test — cycle valves and listen for irregular operation.
Annually or when performance degrades: internal inspection and diaphragm replacement.
Diaphragm replacement — step-by-step (general procedure) Note: Procedure may vary by exact model; follow manufacturer drawings when available.

Prepare
Shut off and lock out air and electrical supply. Bleed residual pressure.
Record valve model and ordering code (e.g., G353A041 / C113443).
Remove valve from system (if required)
For easier access, remove valve from manifold or mounting bracket. Mark tubing/ports for reassembly.

Disassembly
Remove coil (note electrical connector).
Unscrew top cover/bonnet bolts in a criss-cross pattern to release compression evenly. Keep parts and screws organized.
Extract old diaphragm and springs (if present). Inspect internal seats, guide, and sealing surfaces.

Clean & inspect
Clean internal cavity and seating surfaces with lint-free cloth and isopropyl alcohol. Use compressed air to remove debris.
Inspect valve body, seat, and armature for wear/corrosion. Replace any damaged components.
Install new diaphragm and seals
Use the correct diaphragm (example codes above). Ensure correct orientation (concave/convex per drawing).
Fit replacement O-rings/seals as required. Lubricate lightly with compatible grease only if specified.
Reassembly
Reinstall springs and internal parts in correct order. Torque bonnet/cover bolts evenly to manufacturer torque spec.
Refit coil and electrical connections.

Reinstall & test
Reinstall valve to manifold/mount. Reconnect tubing. Gradually pressurize and test for leaks. Cycle several times to verify seal and pulse function.
Observe valve for proper pulse length and diaphragm seating. If leaks or weak pulses persist, re-open and re-check sealing surfaces and part orientation.

Common faults & troubleshooting

Weak/short pulses: check supply pressure, clogged filter, worn diaphragm (replace), or controller settings.
Continuous leaking from valve seat: damaged diaphragm, debris on seat, or improper torque on cover.

 Replace diaphragm and clean seat.
Coil not actuating: check electrical supply, coil resistance, connector integrity.
Valve sticking or sluggish: contaminated air, corroded internal parts, or incorrect diaphragm material (switch to TPU/VITON if chemical/temperature exposure).

Spare parts & maintenance kits

Keep diaphragm replacement kits in inventory (include diaphragm, O-rings, seals, springs). Use matching codes (C113443, C113444, C113825, C113685, C113928) to speed ordering. Note: VITON options available on request.

Ordering & contact 

For genuine or high-quality ASCO-compatible diaphragms and pulse valves (G353A, SCG353, SCEX353 and more), contact YW DKE Trading Company.
Contact Miss Nene — YW DKE TRADING COMPANY

Wechat/WhatsApp: +86-18986934683
QQ: 2997683308
Skype: Nene@ztpindustry.com
Email: Nene@ztpindustry.com
Website: https://www.fittingspneumatic.com/

Closing Following this guide will help your maintenance team perform safe, correct diaphragm changes and upkeep ASCO pulse valves for reliable dust collector operation. YW DKE Trading Company supplies compatible ASCO diaphragms and full technical support — contact Miss Nene to order replacement kits and get fast shipping.

Sales Manager: NENE