The 5-valve direct mount instrument manifold is engineered for direct installation on non-flanged differential pressure transmitters used in demanding process industries. The manifold combines two isolation valves, one balance valve, and two bleed /test valves to provide full pressure control during operation, calibration, and maintenance.
The back-seating valve design enhances sealing reliability when fully open, protecting packing integrity. A two-piece stem with a hardened non-rotating lower section minimizes friction and wear, ensuring long-term stability. The roll-hardened upper stem thread is lubricated and isolated from process media, improving durability and cleanliness.
Each manifold is precision-machined from high-strength material and factory pressure-tested at rated working pressure before shipment to ensure safety and leak-tight performance.
| No. |
Component |
316 Stainless Steel (Material Grade / ASTM Spec.) |
Alloy C-276 (Material Grade / ASTM Spec.) |
| 1 |
Handle |
Aluminum Alloy |
Aluminum Alloy |
| 2 |
Set Screw |
304 Stainless Steel |
304 Stainless Steel |
| 3 |
Packing Gland |
304 Stainless Steel / A479 |
304 Stainless Steel / A479 |
| 4 |
Upper Valve Stem |
316 Stainless Steel / A479 |
304 Stainless Steel / A479 |
| 5 |
Lock Nut |
Stainless Steel |
Stainless Steel |
| 6 |
Bonnet |
316 Stainless Steel / A479 |
Alloy C-276 / B574 |
| 7 |
Packing Gland Ring |
316 Stainless Steel / A479 |
316 Stainless Steel / A479 |
| 8 |
Packing |
PTFE or Graphite |
PTFE or Graphite |
| 9 |
Groove Pin |
Stainless Steel |
Stainless Steel |
| 10 |
Lower Valve Stem |
Hardened 316 Stainless Steel / A479 |
Alloy C-276 / B574 |
| 11 |
Valve Body |
316 Stainless Steel / A479; 316 Stainless Steel / A182 |
Alloy C-276 / B564 |
| — |
Lubricant |
Molybdenum Disulfide-Based |
Molybdenum Disulfide-Based |
Product Features & Functions
Five-Valve Integrated Control
Provides complete isolation, equalization, venting, and testing functions required for differential pressure transmitters.
Back-Seating Safety Design
Back-seal protects packing when valve is fully open, improving operational safety and service life.
Non-Rotating Hardened Lower Stem
Reduces packing wear and internal friction, ensuring smooth and reliable operation.
Dual Vent/Test Capability
Enables independent venting or calibration on both high and low pressure sides.
Direct Mount Compact Structure
Minimizes leakage points and installation space while improving system rigidity.
Product Advantages
- Full differential pressure control in one compact manifold
- Reduced leakage risk compared with remote piping
- Safer maintenance and transmitter calibration
- Longer packing and stem service life
- Stable sealing under high pressure conditions
- Easy installation on non-flanged DP transmitters
This type of valve manifold is specially designed for Rosemount “coplanar” pressure transmitters (including models 3051C, 3051S, 2024 and 3095).
The standard configuration of each valve manifold of this model includes four 7/16″ UNF × 2.08″ high-strength bolts. It can be directly mounted to the transmitter.
Our Company Advantages
- 14+ years specialized in pressure testing and pneumatic boosting equipment R&D and manufacturing
- Annual production capacity exceeding 1000+ equipment sets
- Trusted by 8000+ global customers
- National High-Tech Enterprise with 28+ patents
- Engineering team with 10+ years industry experience
- Member of China Special Equipment Industry Association
- Member of National Instrumentation Standardization Committee
- 10+ years export experience in European and US markets
- ISO 9001 certified quality management system
- CE certified products for international compliance
- Focused on mid-to-high-end industrial instrumentation market
Typical Applications
- Differential pressure transmitters
- Flow measurement systems
- Level measurement systems
- Pressure balancing and calibration loops
- Process instrumentation lines
