Reduce downtime and leakage risks with Class 300 valves engineered for high-temperature, high-pressure applications—trusted by US and global engineering teams.
Purchasing the wrong pressure rating can lead to catastrophic failures—costing your facility thousands in repairs and lost production. Here are the most common pain points our clients face:
In a 2025 survey of 120 US plant engineers, 68% reported at least one pressure-related valve failure in the past two years—average downtime per incident: 14 hours.
Our Class 300 valves (available in gate, globe, check, butterfly, and ball designs) are precision-machined from forged carbon steel, stainless steel, or alloy steel to meet ASME B16.34 and API 600 standards. Each unit undergoes hydrostatic shell testing at 1.5x rated pressure.
Single-source quality control—from casting to finishing—ensures tight tolerances and zero porosity.
Customize face-to-face dimensions, trim material, and actuation (electric, pneumatic, gearbox).
Stock of popular sizes (2″–24″) ships within 5–10 working days. Full production: 25–35 days.
API 607 fire-safe, CE-PED, FDA (for food-grade), CRN for Canada, and ISO 9001:2024 (audited).
| Valve Type | Size Range | Body Material | Pressure Rating | End Connection |
|---|---|---|---|---|
| Gate Valve (Bolted Bonnet) | 2″–24″ | WCB / CF8M / LCB | Class 300 (720 psi @ 100°F) | Flanged RF / RTJ |
| Globe Valve | 2″–16″ | WCB / CF8 / Alloy 20 | Class 300 (720 psi @ 100°F) | Flanged RF / SW |
| Swing Check Valve | 2″–24″ | WCB / SS304 | Class 300 (720 psi @ 100°F) | Flanged RF |
| Triple Offset Butterfly Valve | 3″–48″ | CF8M / Duplex 2205 | Class 300 (740 psi @ 100°F) | Lug / Wafer / Flanged |
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All valves conform to ASME B16.34, API 598, and ISO 5208 Rate A. Shell test pressure = 1.5x rated; seat test = 1.1x rated.
Class 300 (or 300#) is a pressure-temperature rating defined by ASME B16.34. It indicates the maximum allowable working pressure—typically 720 psi at 100°F (38°C) for carbon steel, decreasing at higher temperatures. It is suitable for moderate to high pressure systems.
Yes, but it is over-specified. Class 300 valves have heavier flanges and walls, which may increase cost and weight. However, if you anticipate future pressure upgrades or need a safety margin, it is a valid choice.
We offer WCB (carbon steel), LCB (low temperature carbon steel), CF8M (316 stainless), CF3M (316L), duplex 2205, Alloy 20, and Hastelloy C-276. For high-temperature steam, chrome-moly (F11/F22) is also available.
Yes, for smaller sizes (½″–2″) we supply threaded (NPT/BSP) and socket weld ends. Larger sizes are typically flanged (RF or RTJ) per ASME B16.5.
Standard sizes (2″–12″) in WCB/CF8M are often in stock and can ship within 5–10 working days. Custom alloys or actuated valves require 25–35 days. Expedited options are available.
Simply fill out the form below, or email us at info@thriveonvalve.com. We can provide free samples for evaluation (shipping costs may apply).
Limited-time offer: Free sample for first 10 inquiries from US-based engineering firms. Get your quote within 24 hours.
“We replaced all Class 150 gate valves with Thriveon’s Class 300 on a high-steam injection project. After 2 years, zero weeps and the actuators still operate smoothly. Their tech support is top-notch.”
“Thriveon’s Class 300 butterfly valves met our CRN and FDA requirements for potable water. The delivery was 3 weeks ahead of schedule—unheard of in this region. We’ve ordered two more batches.”
“The OEM customization they offered for Class 300 globe valves was exactly what we needed for our corrosive acid line. Machining tolerances were within 0.1 mm. Highly recommended supplier.”
“Five years ago, I was skeptical of importing valves from China. Thriveon proved me wrong—their Class 300 check valves have outlasted any European brand we used previously. Cost saving of 30%.”
“We use Class 300 gate valves on steam injection headers. Thriveon’s CRN certification made approval easy for Alberta regulations. The valves have been in service for 14 months with no leaks.”
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Call us on:
+86-311-86935302
+86-311-86935302
Email Us:
info@thriveonvalve.com
South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China 
