Integral Bonnet Needle Valves
The integral bonnet needle valve is a compact, one‑piece integral bonnet valve, mainly used for shutting off and rough adjusting liquids and gases in high‑pressure fluid systems. It is designed to withstand operating pressures up to 6,000 PSI (414 BAR), delivering stable performance and reliable sealing for various industrial fluid control scenarios.
Advantages of Integral Bonnet Needle Valve
• Equipped with a professional live‑loaded packing system for stable and long‑lasting sealing performance
• Features easy external adjustment of the packing nut, simplifying daily maintenance and adjustment
• Fully supported packing structure effectively reduces the frequency of later adjustments
• Adopts 2‑piece V‑packing with disc springs, which improves sealing effect, reduces frictional wear, compensates for component wear, and lowers operating torque
• 100% factory tested before delivery, ensuring qualified performance and reliable quality for each single valve
Technical Data
| Item | Parameter |
| Operating Temperature Range | 316 Stainless Steel with PTFE Seal: 65℉ to 450℉ (-53℃ to 232℃) 316 Stainless Steel with PEEK Seal: 65℉ to 600℉ (-53℃ to 315℃) Brass: 65℉ to 400℉ (-53℃ to 204℃) Alloy 400 with PTFE Seal: 65℉ to 450℉ (-53℃ to 232℃) Alloy 400 with PEEK Seal: 65℉ to 500℉ (-53℃ to 260℃) Soft‑seat stem with PCTFE stem tip: 65℉ to 200℉ (-53℃ to 93℃) PTFE Seal: 65℉ to 450℉ (-53℃ to 232℃) PEEK Seal: 65℉ to 600℉ (-53℃ to 315℃) |
| Orifice Size | 0.08" to 0.375" (2mm to 9.5mm) |
| Flow Coefficient (Cv) | 0.09 to 1.80 |
| End Connection Size | 1/8" to 3/4", 3mm to 18mm |
Pressure‑Temperature Ratings
| Temperature, ℉(℃) | 316 Stainless Steel (2.2) Working Pressure psig (bar) | Brass (N/A) Working Pressure psig (bar) | Alloy 400 (3.4) Working Pressure psig (bar) |
| -65 (-53) to 100 (37) | 5000 (344) | 3000 (206) | 3000 (206) |
| 200(93) | 4295 (295) | 2350 (161) | 2640 (181) |
| 250(121) | 4085 (281) | 2200 (151) | 2555 (176) |
| 300(148) | 3875 (266) | 2050 (141) | 2470 (170) |
| 350(176) | 3715 (255) | 1470 (101) | 2430 (167) |
| 400(204) | 3560 (245) | 390 (26) | 2390 (164) |
| 450(232) | 3435 (236) | 2380 (163) | |
| 500(260) | 3310 (228) | 2375 (163) | |
| 600(315) | 3130 (215) |
Material of Main Components
| No. | Component Name | Stainless Steel | Brass | Alloy 400 |
| 1 | Body | F316 Stainless Steel / A182 | Brass / B283 | Alloy 400/B564 |
| 2 | Panel Mount Nut | 316 Stainless Steel / A276 | Brass / B16 | Alloy 400/B164 |
| 3 | Tapered Stem Tip | 316 Stainless Steel / A479 | 316 Stainless Steel / A479 | Alloy 400/B164 |
| Regulating Stem Tip | 316 Stainless Steel / A479 | 316 Stainless Steel / A479 | Alloy 400/B164 | |
| Soft Stem Tip | 316 Stainless Steel / A479+PCTFE | 316 Stainless Steel / A479+PCTFE | Alloy 400/B164+PCTFE | |
| 4 | Lower Packing Seat | 316 Stainless Steel / A479 | Brass / B16 | Alloy 400/B164 |
| 5 | Lower Packing | PTFE | PTFE | PTFE |
| 6 | Upper Packing | PTFE | PTFE | PTFE |
| 7 | Round Handle | Aluminum alloy + nylon round handle (with brass insert optional) | Aluminum alloy + nylon round handle (with brass insert optional) | Aluminum alloy + nylon round handle (with brass insert optional) |
| Lever Handle | Aluminum alloy lever handle or stainless steel lever handle | Aluminum alloy lever handle or stainless steel lever handle | Aluminum alloy lever handle or stainless steel lever handle | |
| Lock Screw | Stainless Steel | Stainless Steel | Stainless Steel | |
| 8 | Gasket | 316 Stainless Steel / A276 | 316 Stainless Steel / A276 | 316 Stainless Steel / A276 |
| 9 | Belleville Spring | S17700/A693 | S17700/A693 | S17700/A693 |
| 10 | Upper Packing Seat | 316 Stainless Steel / A479 | Brass / B16 | Alloy 400/B164 |
| 11 | Packing Gland | 316 Stainless Steel / A479 | Brass / B16 | Alloy 400/B164 |
Ordering Information (Model Coding Rules)
Example: YNV3 M 6N S 8 RS PE KH SS
| 1. Valve Series | ||
| Type | Model | Orifice Size |
| Straight Pattern | YNV1 | 2.0mm Orifice |
| YNV2 | 4.4mm Orifice | |
| YNV3 | 6.3mm Orifice | |
| YNV4 | 9.5mm Orifice | |
| Angle Pattern | YNV1A | 2.0mm Orifice |
| YNV2A | 4.4mm Orifice | |
| YNV3A | 6.3mm Orifice | |
| YNV4A | 9.5mm Orifice | |
| 2. End Connection Type | |
| Code | Type |
| S | Yiluoke Ferrule Fitting |
| M | Male Thread Fitting |
| F | Female Thread Fitting |
| 3. End Connection Size | |||||
| Tube Outer Diameter Code | |||||
| Code | Tube OD (in.) | Code | Tube OD (mm) | ||
| 1 | 1/16 | 3M | 3 | ||
| 2 | 1/8 | 6M | 6 | ||
| 4 | 1/4 | 8M | 8 | ||
| 6 | 3/8 | 10M | 10 | ||
| 8 | 1/2 | 12M | 12 | ||
| 12 | 3/4 | 16M | 16 | ||
| Pipe Thread Code | |||||
| 1/8 | 1/4 | 3/8 | 1/2 | 3/4 | |
| NPT Thread | 2N | 4N | 6N | 8N | 12N |
| BSPT Thread | 2R | 4R | 6R | 8R | 12R |
| 4. Stem Type | |
| Code | Description |
| Blank | Tapered Stem Tip (Standard) |
| RS | Regulating Stem Tip |
| ST | Soft‑Seat Stem Tip |
| 5. Packing | |
| Code | Description |
| Blank | PTFE Packing (Standard) |
| PE | PEEK Packing |
| 6. Handle | |
| Code | Description |
| Blank | Stainless Steel Lever Handle (Standard) |
| KH | Black Round Handle |
| AH | Black Anodized Aluminum Alloy Handle |
| 7. Valve Body Material | |
| Code | Description |
| SS | 316 Stainless Steel |
| B | Brass |
| M40 | Alloy 400 (Monel) |
Model Example
| Example 1: YNV2 S4 SS | |
| Item | Content |
| Valve Series | Straight Pattern, 4.4mm Orifice |
| Inlet | Yiluoke 1/4" Ferrule Fitting |
| Outlet | Yiluoke 1/4" Ferrule Fitting |
| Stem Type | Tapered Stem Tip |
| Packing Material | PTFE Packing |
| Handle | Stainless Steel Lever Handle |
| Valve Body Material | 316 Stainless Steel Body |
