Direct Answer
The Q22HD is a 2/2 way pneumatic control valve from KLQD · Ningbo Kailing Pneumatic — a brass-body, air-piloted globe valve for compressed air, oil, water and steam. It covers DN10–50 with a 0–1.0 MPa pressure range and needs no electricity at the valve body, making it inherently safe for oil & gas, chemical and power plant service.
FAQ
Q1: What industries use the Q22HD most?
The Q22HD sees its highest volume in three sectors:
Oil & Gas — Pneumatic actuation eliminates spark risk. Used on instrument air headers, sampling lines and utility stations at well pads, gathering systems and tank farms.
Chemical Processing — Brass resists many non-corrosive chemicals. Specified for batch reactor feed lines, solvent distribution and compressed air headers.
Power Generation — Steam tracing, condensate return and cooling-water bypass lines that tolerate continuous heat cycling.
Also widely used in water treatment (filter backwash, dosing), marine & offshore (fuel transfer, ballast), pharmaceutical (clean utility air), and metallurgy (cooling water, hydraulic oil).
Q2: What media can the Q22HD handle?
| Media | Suitability | Notes |
|---|---|---|
| Compressed air | ✅ Primary use | Instrument air, plant air, pneumatic headers |
| Hydraulic oil | ✅ | Mineral-based oils; confirm seal material |
| Water | ✅ | Municipal, cooling tower, process water |
| Saturated steam | ✅ | Within 0–1.0 MPa and brass temperature limits |
| Natural gas | ✅ | Dry, non-corrosive; confirm local code |
⚠️ Not for strong acids, alkalis or chlorinated solvents. For aggressive media, ask about KLQD stainless steel or PTFE-lined alternatives.
Q3: How does it compare to an electric solenoid valve?
| Factor | Q22HD (Pneumatic) | Electric Solenoid |
|---|---|---|
| Actuation | Pilot air 3–8 bar | Electric coil AC/DC |
| Explosion safety | Inherently safe | Needs Ex-rated coil & wiring |
| Shutoff | Globe valve — metal seat | Poppet or diaphragm |
| Continuous duty | Excellent — air holds position | Coil may overheat |
| Best for | Hazardous areas, steam, oil, high-cycle | Clean dry air, fast switching |
Choose the Q22HD when the environment demands zero electrical components at the valve point and a positive globe-style shutoff.
Q4: What DN sizes are available?
| DN | Bore | Typical Application |
|---|---|---|
| DN10 | 10 mm | Instrument air, dosing lines |
| DN15 | 15 mm | Pilot lines, sampling |
| DN20 | 20 mm | Air branches, lubrication |
| DN25 | 25 mm | Steam tracing, cooling water |
| DN32 | 32 mm | Process headers, oil transfer |
| DN40 | 40 mm | Utility mains, filter feed |
| DN50 | 50 mm | Main shutoff, tank discharge |
Match DN to pipe size. For flow-coefficient (Cv/Kv) sizing, send your flow rate and pressures to Kailing.
Q5: Why brass? When should I choose stainless steel?
Brass gives an excellent cost-to-performance ratio for non-corrosive media. The Q22HD body is machined from lead-free brass billet at Kailing's Fenghua CNC workshop and pressure-tested before shipment.
Choose brass: air, oil, water, non-aggressive steam; cost-sensitive projects.
Choose stainless steel: aggressive media, 316L for pharma/food contact, or when your spec demands it. Kailing offers stainless alternatives across the catalog.
Q6: What pilot pressure does it need?
The internal pneumatic piston requires 0.3–0.8 MPa (3–8 bar) clean, dry instrument air — standard in any industrial plant. The pilot circuit is isolated from the main media path.
Q7: Who typically buys the Q22HD?
| Buyer | Use Case |
|---|---|
| MRO procurement | Valve replacement during plant turnarounds |
| OEM skid builders | Integration into compressors, dryers, boiler packages |
| EPC project engineers | Specifying for new-build plants with ISO 9001 documentation |
| Industrial distributors | Stocked SKU for MRO and project markets globally |
Q8: Can Kailing customize it for OEM?
Yes. Since 2003, KLQD has provided OEM/ODM pneumatic components. For Q22HD:
- Thread type: G (BSPP), NPT, Rc (BSPT)
- Seal material: NBR (-10°C to 80°C), FKM (oil-resistant), EPDM (steam)
- Pilot port orientation
- Private-label branding and packaging
Send drawings; engineering review takes 1–2 business days.
Why KLQD · Ningbo Kailing Pneumatic?
| Advantage | What It Means |
|---|---|
| Factory-direct since 2003 | You deal with the machining shop, not a trading desk |
| ISO 9001 certified | Every valve function-tested and leak-tested; reports on request |
| One-roof manufacturing | Machining, assembly, testing at one Ningbo site — shorter lead times |
| OEM/ODM capable | Custom threads, seals, branding without excessive MOQ |
| English technical support | Media compatibility and sizing answers same-day |
Get a Quote
Send these six items for a same-day review:
- Media type (air / oil / water / steam / gas)
- Operating pressure (MPa) and temperature (°C)
- DN size (DN10–50)
- Connection thread (G / NPT / Rc)
- Seal preference (NBR / FKM / EPDM)
- Quantity and delivery window
Sources
Based on KLQD Ningbo Kailing Pneumatic internal technical documentation, Q22HD product specifications, and engineer-confirmed media compatibility data. Industry application rankings drawn from Kailing's global customer order history and standard pneumatic valve market references.
KLQD · Ningbo Kailing Pneumatic Co., Ltd. — Precision pneumatic components since 2003.
Frequently Asked Questions
- FAQ Why brass? When choose stainless steel?
Brass offers excellent cost-to-performance. Machined from billet at Kailing Fenghua. Choose SS for aggressive media.
Need a quotation?
Send the page link, quantity, drawings and working conditions to Kailing for review.