The 3-Valve Instrument Manifold – Direct Mount (Non-Flanged Transmitter) is designed for direct installation on non-flanged differential pressure transmitters.
It integrates two isolation valves and one equalizing valve in a compact block body to enable isolation, equalization, and shut-off control between process impulse lines and the transmitter.
The direct-mount configuration provides a stable and compact pressure control interface for differential pressure measurement systems.
| 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 |
Features and Functions
- Direct mounting to non-flanged differential pressure transmitters
- Integrated 3-valve configuration (two isolation + one equalizing)
- Back-seated valve structure for reliable isolation sealing
- Equalizing valve balances HP and LP pressure during calibration
- Non-rotating hardened lower stem reduces packing wear
- Roll-hardened upper stem thread isolated from process fluid
- Smooth valve operation with reduced friction
- Vent/test port for pressure release or test connection
- Factory pressure-tested before delivery
Product Advantages
- The back-sealed valve design ensures reliable isolation during transmitter maintenance and calibration procedures.
- The hardened non-rotating stem reduces packing wear and internal friction, extending service life and improving operational stability.
- Lubrication isolation between stem thread and process fluid maintains cleanliness and prevents contamination.
- Direct mounting reduces connection points and improves sealing integrity in differential pressure measurement assemblies.
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
