
VLV-HPSL / HPOSL · Air Operated Springless Diaphragm Valve
Air operated springless diaphragm packless valve for remote automated cycling — GasFlo HPSL Series. Two configurations: HPSL normally closed and HPOSL normally open. The valve stays static unless actuation pressure is continuously applied. Body in brass, nickel-plated brass, 316L SS, Monel® R405 or aluminium-silicon bronze; ELGILOY® diaphragm. Up to 3,500 psig.
- Max working pressure
- 3,500 PSIG
- Actuation pressure
- 70–125 PSIG
- Flow coefficient
- Cv = 0.14
- Seat orifice
- Ø.125"
Materials
| Max working pressure | 3,500 PSIG |
|---|---|
| Actuation pressure | 70–125 PSIG |
| Flow coefficient | Cv = 0.14 |
| Seat orifice | Ø.125" |
| Seat material | PCTFE |
| Diaphragm material | ELGILOY® |
| Temperature range | −65°F to +150°F |
| Seat leakage (max) | 2×10⁻⁸ ATM CC/SEC He |
| Inboard leakage (max) | 2×10⁻⁸ ATM CC/SEC He |
| Bottom mount | 2 × #10-32 tapped holes on a 1" bolt circle |
| Actuation port | 1/8" FNPT |
| Repair kit | RK-SL-DIA |
Applications & Documents
Configure your order
Select the variables exactly as they appear in the manufacturer datasheet. The full part number is assembled automatically.
Series
single select · 2 valuesInlet port size
single select · 2 valuesInlet connection
single select · 7 valuesOutlet port size
single select · 2 valuesOutlet connection
single select · 7 valuesMaterial
single select · 5 valuesSelect variables
More from this category
Why GPTech
Since 2000
Multidisciplinary expertise in gas and advanced piping systems.
UHP grade
Products for ultra-high-purity clean-gas systems.
Engineering support
From product selection to installation and maintenance.
Fast response
Professional quotes quickly — via RFQ or WhatsApp.
Applications
We serve hundreds of customers across diverse industrial segments.
Need a quote?
Talk to our engineer and get a fast, professional response.


