[Product Introduction] YNV Lift Safety Relief Valve: HSV-3S1

nick so
Dec 31, 2025
1 min read

Hello, this is Nick from NEFSS.

Starting today, I’ll be sharing insights on various industrial products I’ve directly handled and managed in the field.

Our first featured product is the YNV Lift Safety Relief Valve, Model HSV-3S1.

To be honest, this was a true "steady seller" and "cash cow" during my time at YNV.

I remember my senior colleagues in the shipbuilding department consistently shipping out 200 units at a time. This high volume is a testament to the product's proven reliability and durability without frequent breakdowns.

📷 Real Product & Technical Drawing

You can review the structure of the model through the actual product photo and the technical drawing below.

🛠️ Key Specifications of HSV-3S1 (Summary by Nick)

For engineers, here are the essential technical specifications at a glance:

Category	Technical Details
Maker	YNV
Applied Fluid	AIR, GAS (Compressed Air & Refrigerant Gas)
Design Pressure	425 psig
Design Temp.	Max 220°C
Connection Size	1/2" Male PT x 5/8" Male PF
Main Material	Body: Forged Brass / Trim: SUS & PTFE

Unlike standard safety valves that use a metal-to-metal contact, this model features a PTFE (Teflon) Soft Seat. This design choice provides exceptional sealing performance, effectively preventing even the finest leaks.