Belgas P255 High-Capacity Relief Valve
Rp123000.00
P255 High-Capacity Relief Valve
Product Description
The BelGAS P255 High-Capacity Relief Valve is engineered for use with BelGAS and other industrial gas pressure regulators. It functions as an overpressure protection device by safely venting excess system pressure to atmosphere or a designated safe discharge point.
This model delivers dependable resealing performance, high flow capacity, and durable construction suitable for natural gas and air service applications.
Key Features
Zero leakage up to 98% of set pressure
Set pressure tolerance: ±5%
Resealing at 92% of set pressure
Available line sizes: 3/4" and 1" NPT
Supplied with rubber rain cap
High-capacity venting performance for gas systems
Technical Specifications
1. Available Sizes
Pipe Size | Dimension A | Hex Size |
3/4" NPT | 3.39 in | 1-3/4" |
1" NPT | 3.79 in | 1-3/4" |
2. Set Pressure Options
Part Number | NPT Size | Set Pressure |
P25506BB1050 | 3/4" | 50 PSIG |
P25508BB1050 | 1" | 50 PSIG |
P25506BB1055 | 3/4" | 55 PSIG |
P25508BB1055 | 1" | 55 PSIG |
P25506BB1070 | 3/4" | 70 PSIG |
P25508BB1070 | 1" | 70 PSIG |
P25506BB1075 | 3/4" | 75 PSIG |
P25508BB1075 | 1" | 75 PSIG |
P25506BB1100 | 3/4" | 100 PSIG |
P25508BB1100 | 1" | 100 PSIG |
P25506BB1125 | 3/4" | 125 PSIG |
P25508BB1125 | 1" | 125 PSIG |
P25506BB1150 | 3/4" | 150 PSIG |
P25508BB1150 | 1" | 150 PSIG |
3. Materials of Construction
Component | Material |
Body | CDA360 Brass |
Spring | 302 Stainless Steel |
Retainer | CDA360 Brass |
Seal | Nitrile |
4. Flow Capacity (Air / Natural Gas Equivalent)
Flow rates in SCFH (Standard Cubic Feet per Hour)
Spring Range (PSIG) | Vessel Pressure (PSIG) | Set Pressure (PSIG) | Flow (SCFH) |
45–90 | 65 | 50 | 24,000 |
75 | 36,700 | ||
85 | 46,100 | ||
100–150 | 110 | 100 | 23,100 |
120 | 36,600 | ||
130 | 47,100 | ||
100–150 | 135 | 125 | 32,200 |
150 | 50,700 | ||
165 | 72,100 | ||
100–150 | 160 | 150 | 47,000 |
170 | 61,600 | ||
180 | 72,500 |
Ordering Information
When ordering, specify:
Model: P255 High-Capacity Relief Valve
Size: 3/4" or 1" NPT
Set Pressure: 50–150 PSIG
Materials: Standard CDA360 Brass / SS302 / Nitrile
