Fully guided spring
Keeps compression consistent at high set pressures.
High pressure
High pressure and CNG
High pressure safety relief valves for CNG and other high pressure applications. The 9100 Model 20 covers 3,000 to 8,700 psig, and the smaller framed 1400 covers 150 to 6,000 psig.
- Set pressure
- 150 to 8,700 psig1,034 to 59,980 kPag
- Orifices
- B, C, D
- Service
- Air, gas, liquidLiquid on Model 20 only
- Code
- ASME XIIIUV stamped
Tap a point to look insideFive parts that make the M20 / 1400 work.
Overview
High pressure and CNG at a glance
The 9100 Model 20 brings the 9100's soft seat, high flow rate design to high pressure duty. It is manufactured to the ASME Boiler and Pressure Vessel Code, Section XIII, for UV stamped applications in air/gas and liquid service.
The 1400 pairs the same soft seat and fully guided disk design with a non-rising stem and smaller frame, for air/gas service up to 6,000 psig in tight spaces.
Where it's used
- CNG
- High pressure applications
- Tight spaces (1400)
How it works
Watch the valve pop and reseat.
A spring holds the disk on the seat until system pressure reaches set. Then the valve pops to full lift, relieves, and reseats once pressure drops through the blowdown.
ClosedSpring force holds the disk on the lip seal seat. Pressure is below set.
- Closed
- Pop
- Relieving
- Reseated
Tap a step to jump to it in the cutaway.
Animated cutaway for illustration. Blowdown varies by size, service and setting.
Models at a glance
Compare the M20 / 1400 range
Ranges from Mercer's published figures. kPag conversions are rounded.
| 9100 Model 20 | 1400 | |
|---|---|---|
| Service | Air, gas and liquid | Air and gas |
| Orifices | C, D | B |
| Set pressure (psig) | 3,000 to 8,700 | 150 to 6,000 |
| Set pressure (kPag) | 20,684 to 59,984 | 1,034 to 41,369 |
Pressure check
Will a M20 / 1400 cover your set pressure?
Type your set pressure. If it falls outside the range, we'll point you at the series that covers it.
Enter a set pressure above zero.
Covered
Auto Seat Technology®
What's inside a M20 / 1400
The Auto Seat features that do most of the work in this series.
Mechanical stops
Limits travel so the spring is never over compressed.
Fully guided disk
Keeps the disk aligned with the nozzle under high loads.
Lip seal seat
Uses system pressure to seal tighter against the disk.
Already running M20 / 1400s?
Recertify them in Brisbane
- Tested as found, with a report on every valve
- Gas service on gas, liquid service on water
- Back on site ready to install, under the Inland Transport Guarantee
Book a recert →or call the workshop on 07 3265 4888
Documents
Manuals, data sheets and certificates
Everything for the M20 / 1400, downloadable from this site.
IOM
Installation and maintenance manual
How to install, operate and maintain the M20 / 1400.
Download
Data
Data sheet
Dimensions, orifice areas, materials and pressure ratings.
Download
Cert
Sample verification certificate
The certificate that comes back with every recertified valve.
Download
Warranty
Australian warranty
Mercer Brisbane 1 year and 3 year warranty terms.
View terms →
Other Australian series
Not quite the right valve?
Request a quote
Build your M20 / 1400 quote
Four quick steps. We'll come back with price and lead time from Brisbane. Or call 07 3265 4888.